The forces which meet at one point but their lines of action do not lie in one plane, are called a.Coplanar noncurrent forces b.Non-coplanar nonconcurrent forces c.Intersecting forces d.Coplanar concurrent forces e.

The forces which meet at one point but their lines of action do not lie in one plane, are called a.Coplanar noncurrent forces b.Non-coplanar nonconcurrent forces c.Intersecting forces d.Coplanar concurrent forces e.
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c. Non-coplanar nonconcurrent forces
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The forces, which meet at one point, but their lines of action do not lie in a plane, are called (A) Coplanar non-concurrent forces (B) Non-coplanar concurrent forces(C) Non-coplanar non-concurrent forces (D) Intersecting forces

Description : The forces, which meet at one point, but their lines of action do not lie in a plane, are called  (A) Coplanar non-concurrent forces  (B) Non-coplanar concurrent forces (C) Non-coplanar non-concurrent forces  (D) Intersecting forces

Last Answer : (B) Non-coplanar concurrent forces 

When all the forces acting on a body lie in one plane and their lines of action meet at one point, the forces a.constitute a moment b.constitute a couple c.are known as coplaner-concurrent forces. d.are known as non-coplaner forces e.107 dynes

Description : When all the forces acting on a body lie in one plane and their lines of action meet at one point, the forces a.constitute a moment b.constitute a couple c.are known as coplaner-concurrent forces. d.are known as non-coplaner forces e.107 dynes

Last Answer : c. are known as coplaner-concurrent forces.

A rigid body is in equilibrium under the action of these forces when a.These forces are equal b.The lines of action of these forces are parallel c.The lines of action of these forces meet in a point d.(A) and (B) above e.(B) and (C) above

Description : A rigid body is in equilibrium under the action of these forces when a.These forces are equal b.The lines of action of these forces are parallel c.The lines of action of these forces meet in a point d.(A) and (B) above e.(B) and (C) above

Last Answer : e. (B) and (C) above

Forces are called concurrent when their lines of action meet in (A) One point (B) Two points (C) Plane (D) Perpendicular planes

Description : Forces are called concurrent when their lines of action meet in (A) One point (B) Two points (C) Plane (D) Perpendicular planes

Last Answer : (A) One point

If three non-parallel forces hold a rigid body in equilibrium, they must a.be non-coneurrent b.be colinear c.107 dynes d.be equal in magnitude e.be concurrent

Description : If three non-parallel forces hold a rigid body in equilibrium, they must a.be non-coneurrent b.be colinear c.107 dynes d.be equal in magnitude e.be concurrent

Last Answer : e. be concurrent

Three forces A, B and C of magnitudes 8 N, 12 N and 20 N acting on a particle are in equilibrim. It can be concluded that a.107 dynes b.B and C act in opposite directions c.one of the forces in non-coplaner d.A and B act at 90? e.one of the forces is non-concurrent

Description : Three forces A, B and C of magnitudes 8 N, 12 N and 20 N acting on a particle are in equilibrim. It can be concluded that a.107 dynes b.B and C act in opposite directions c.one of the forces in non-coplaner d.A and B act at 90? e.one of the forces is non-concurrent

Last Answer : b. B and C act in opposite directions

The forces, which meet at one point, but their lines of action do not lie in a plane, are called?

Description : The forces, which meet at one point, but their lines of action do not lie in a plane, are called?

Last Answer : The forces, which meet at one point, but their lines of action do not lie in a plane, are called non-coplanar concurrent forces.

When two concurrent and coplaner forces P and Q act at an angle of 180?, their resultant will be a a.moment equal to PQ b.couple c.(P-Q) d.107 dynes e.zero

Description : When two concurrent and coplaner forces P and Q act at an angle of 180?, their resultant will be a a.moment equal to PQ b.couple c.(P-Q) d.107 dynes e.zero

Last Answer : c. (P-Q)

Forces are called coplanar when all of them acting on body lie in (A) One point (B) One plane (C) Different planes (D) Perpendicular planes

Description : Forces are called coplanar when all of them acting on body lie in  (A) One point  (B) One plane  (C) Different planes  (D) Perpendicular planes 

Last Answer : (B) One plane 

The necessary condition for the forces acting on a body to be in equilibrium is that these should be a.In the same direction b.Coplaner c.Similar in nature d.Should not meet at a point e.(B) and (D) above

Description : The necessary condition for the forces acting on a body to be in equilibrium is that these should be a.In the same direction b.Coplaner c.Similar in nature d.Should not meet at a point e.(B) and (D) above

Last Answer : e. (B) and (D) above

According to principle of transmissiblity of forces, when a force acts upon a body, its effect is a.maximum when it acts at C.G. of the body b.minimum when it acts at C.G. of the body c.different at different points of the body d.107 dynes e.same at every point in its line of action

Description : According to principle of transmissiblity of forces, when a force acts upon a body, its effect is a.maximum when it acts at C.G. of the body b.minimum when it acts at C.G. of the body c.different at different points of the body d.107 dynes e.same at every point in its line of action

Last Answer : e. same at every point in its line of action

According to the principle of transmissibility of forces, when a force acts upon a body ; its effect is a.Minimum when it acts at C.G. of the body b.Maximum when it acts at C.G. of the body c.Different at different points of body d.Same at every point in its line of action e.None of the above

Description : According to the principle of transmissibility of forces, when a force acts upon a body ; its effect is a.Minimum when it acts at C.G. of the body b.Maximum when it acts at C.G. of the body c.Different at different points of body d.Same at every point in its line of action e.None of the above

Last Answer : d. Same at every point in its line of action

Forces are called concurrent when their lines of action meet in?

Description : Forces are called concurrent when their lines of action meet in?

Last Answer : Forces are called concurrent when their lines of action meet in one point.

when the biconditional statement is separated into a conditional and its converse which of these cannot be the converse Biconditional: Lines r coplanar if and only if they lie in the same plane.?

Description : when the biconditional statement is separated into a conditional and its converse which of these cannot be the converse Biconditional: Lines r coplanar if and only if they lie in the same plane.?

Last Answer : Biconditional: Lines r coplanar if and only if they lie in the same plane. Conditional: If lines are coplanar then they lie in the same plane.

The statement --- if forces acting on a point can be represented in magnitude and direction by the sides of a polygon taken in order then their resultant will be represented in magnitude and direction by the closing side of the polygon taken in opposite order ---- is known as a.Law of triangle of forces b.Newton's law of forces c.Law of polygon of forces d.D'Alembert's rule e.Lami's theorem

Description : The statement --- if forces acting on a point can be represented in magnitude and direction by the sides of a polygon taken in order then their resultant will be represented in magnitude and direction by the closing ... 's law of forces c.Law of polygon of forces d.D'Alembert's rule e.Lami's theorem

Last Answer : c. Law of polygon of forces

The statement the resultant of the external forces applied to a body (rigid or non-rigid) composed of a system of particles is equivalent to the vector summation of the effective forces acting on all particles-is known as a.Corollary to Newton's laws of motion b.Principle of dynamics c.D' Alembert's principle d.Nowton's law e.Mohr's principle

Description : The statement the resultant of the external forces applied to a body (rigid or non-rigid) composed of a system of particles is equivalent to the vector summation of the effective forces acting on all ... motion b.Principle of dynamics c.D' Alembert's principle d.Nowton's law e.Mohr's principle

Last Answer : c. D' Alembert's principle

The statement ---- if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two ---- is known as a.Law of polygon of forces b.D'Alembert's principle c.Newtons law of forces d.Lami's theorem e.Law of triangle of forces

Description : The statement ---- if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two ---- is known as a.Law of polygon of forces b.D'Alembert's principle c.Newtons law of forces d.Lami's theorem e.Law of triangle of forces

Last Answer : d. Lami's theorem

When two forces acting at a point are such that if the direction of one is reversed, the direction of the resultant is turned through a right angle, the forces must be a.inclined at more than 90? b.inclined at less than 90? c.equal in magnitude d.acting at 180? e.107 dynes

Description : When two forces acting at a point are such that if the direction of one is reversed, the direction of the resultant is turned through a right angle, the forces must be a.inclined at more than 90? b.inclined at less than 90? c.equal in magnitude d.acting at 180? e.107 dynes

Last Answer : c. equal in magnitude

A number of forces acting at a point will be in equilibrium if a.Sum of the forces is zero b.Algebraic sum of the forces is zero c.Sum of the resolved parts in any two perpendicular directions are both zero d.None of the above e.The metacentre of the body

Description : A number of forces acting at a point will be in equilibrium if a.Sum of the forces is zero b.Algebraic sum of the forces is zero c.Sum of the resolved parts in any two perpendicular directions are both zero d.None of the above e.The metacentre of the body

Last Answer : d. None of the above

The necessary condition of equilibrium of a body is a.The algebraic sum of horizontal components of all forces must be zero b.The algebraic sum of vertical components of all forces must be zero c.The algebraic sum of forces about a point must be zero d.All the above e.None of the above

Description : The necessary condition of equilibrium of a body is a.The algebraic sum of horizontal components of all forces must be zero b.The algebraic sum of vertical components of all forces must be zero c.The algebraic sum of forces about a point must be zero d.All the above e.None of the above

Last Answer : d. All the above

The centre of percussions is a.The point of application of the resultant of all the forces tending to cause a body to rotate about a central axis b.The point of application of the resultant of gravity and buoyancy forces of the body c.The same as centre of gravity d.The metacentre of the body e.The point in a body about which it can rotate horizontally and oscillates under the influence of gravity

Description : The centre of percussions is a.The point of application of the resultant of all the forces tending to cause a body to rotate about a central axis b.The point of application of the resultant ... .The point in a body about which it can rotate horizontally and oscillates under the influence of gravity

Last Answer : a. The point of application of the resultant of all the forces tending to cause a body to rotate about a central axis

According to principle of moments (A) If a system of coplanar forces is in equilibrium, then their algebraic sum is zero (B) If a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero (C) The algebraic sum of the moments of any two forces about any point is equal to moment of their resultant about the same point (D) Positive and negative couples can be balanced

Description : According to principle of moments  (A) If a system of coplanar forces is in equilibrium, then their algebraic sum is zero  (B) If a system of coplanar forces is in equilibrium, then the ... of  their resultant about the same point  (D) Positive and negative couples can be balanced

Last Answer : (C) The algebraic sum of the moments of any two forces about any point is equal to moment of  their resultant about the same point 

The necessary condition for forces to be in equilibrium is that these should be (A) Coplanar (B) Meet at one point (C) Both (A) and (B) above (D) All be equal

Description : The necessary condition for forces to be in equilibrium is that these should be (A) Coplanar (B) Meet at one point (C) Both (A) and (B) above (D) All be equal

Last Answer : (C) Both (A) and (B) above

A mass of 5 kg moves on a smooth horizontal plane with a speed of 8 m/s attached to a fixed point on the plane by a string of length 4m. Tension in the string is a.785 b.80N c.392.4N d.None of the above e.Tapered bearing

Description : A mass of 5 kg moves on a smooth horizontal plane with a speed of 8 m/s attached to a fixed point on the plane by a string of length 4m. Tension in the string is a.785 b.80N c.392.4N d.None of the above e.Tapered bearing

Last Answer : b. 80N

A body of weight 100 kg is placed on a horizontal plane. A horizontal force of 30 kg is applied and the block is just on the point of motion. The angle of friction is a.About 16? b.30? c.45? d.60? e.None of the above

Description : A body of weight 100 kg is placed on a horizontal plane. A horizontal force of 30 kg is applied and the block is just on the point of motion. The angle of friction is a.About 16? b.30? c.45? d.60? e.None of the above

Last Answer : a. About 16?

A block slides down a smooth inclined plane when released from the top while another falls freely from the same point. The value of which parameter in the two cases will be identical? a.Time taken to reach the ground b.Kinetic energy at the ground c.Momentum at the ground d.Velocity while touching the ground e.Kinetic energy after one second

Description : A block slides down a smooth inclined plane when released from the top while another falls freely from the same point. The value of which parameter in the two cases will be identical? a.Time ... ground c.Momentum at the ground d.Velocity while touching the ground e.Kinetic energy after one second

Last Answer : d. Velocity while touching the ground

Forces are called coplanar when all of them acting on body lie in?

Last Answer : Forces are called coplanar when all of them acting on body lie in one plane.

A rigid body is suspended vertically at a point and oscillates with a small amplitude under the action of the force of gravity. Such an arrangement is called a.Simple pendulum b.Rigid pendulum c.Second's pendulum d.Compound pendulum e.Newton's pendulum

Description : A rigid body is suspended vertically at a point and oscillates with a small amplitude under the action of the force of gravity. Such an arrangement is called a.Simple pendulum b.Rigid pendulum c.Second's pendulum d.Compound pendulum e.Newton's pendulum

Last Answer : d. Compound pendulum

In which case power required would be more a.In lifting up a weight of 100 kg at a velocity of 3 m/sec but accelerating upwards at 0.5 m/sec b.In lowering a weight of 100 kg along an a inclined plane at an angle of 45? with c.In lifting up a weight of 100 kg at a constant speed of 3 m/sec d.In lowering the weight at a constant speed of 3 m/sec e.In lowering the weight at a velocity of 3 m/sec and acceleration of 1 m/sec2

Description : In which case power required would be more a.In lifting up a weight of 100 kg at a velocity of 3 m/sec but accelerating upwards at 0.5 m/sec b.In lowering a weight of 100 kg along an a inclined plane ... speed of 3 m/sec e.In lowering the weight at a velocity of 3 m/sec and acceleration of 1 m/sec2

Last Answer : a. In lifting up a weight of 100 kg at a velocity of 3 m/sec but accelerating upwards at 0.5 m/sec

A truss element a.107 dynes b.resists lateral forces c.is a two-force body d.is a three force body e.resist forces in compression only

Description : A truss element a.107 dynes b.resists lateral forces c.is a two-force body d.is a three force body e.resist forces in compression only

Last Answer : c. is a two-force body

In case forces of 1 N, 2 N, 3 N, 4 N, 5 N and 6 N act in order along the sides of a regular hexagon, the resultant will be a.21 N b.107 dynes c.2 N d.6 N e.

Description : In case forces of 1 N, 2 N, 3 N, 4 N, 5 N and 6 N act in order along the sides of a regular hexagon, the resultant will be a.21 N b.107 dynes c.2 N d.6 N e.

Last Answer : d. 6 N

A locomotive of weight 100 tonnes is attached to train of wagons weighing 1000 tonnes. The locomotive pulls the wagons with a constant velocity of 36 km/hour. When the coupling between the train and wagons breaks, the wagons roll on 95 m in 10 sec. The distance between the locomotive and the wagons at this instant assuming that the forces acting on the train are unaltered would be a.0.36 m b.0.44 m c.0.77 m. d.0.5 m e.0.66 m

Description : A locomotive of weight 100 tonnes is attached to train of wagons weighing 1000 tonnes. The locomotive pulls the wagons with a constant velocity of 36 km/hour. When the coupling between the train and wagons breaks, the wagons roll on 95 m in ... would be a.0.36 m b.0.44 m c.0.77 m. d.0.5 m e.0.66 m

Last Answer : d. 0.5 m

The resultant of coplaner parallel forces is found by load line diagram, while the position is found by a.link polygen b.funicular polygon c.string polygon d.any of the above e.107 dynes

Description : The resultant of coplaner parallel forces is found by load line diagram, while the position is found by a.link polygen b.funicular polygon c.string polygon d.any of the above e.107 dynes

Last Answer : d. any of the above

Two forces of 6 and 8 kg act at right angles to each other, the resultant force will be a.100 b.28 c.41 d.14 e.10

Description : Two forces of 6 and 8 kg act at right angles to each other, the resultant force will be a.100 b.28 c.41 d.14 e.10

Last Answer : e. 10

An electric motor drives a windless which hauls up a crate A of weight W = 500 kg up an inclined plane through a height of 10 m in 2 minutes. The torque acting on the windless is 25 kgm and the drum of the windless makes 30 rpm. The efficiency of the inclined plane would be a.0.41 b.0.61 c.0.265 d.0.5305 e.0.66

Description : An electric motor drives a windless which hauls up a crate A of weight W = 500 kg up an inclined plane through a height of 10 m in 2 minutes. The torque acting on the windless is 25 kgm and the drum of the ... The efficiency of the inclined plane would be a.0.41 b.0.61 c.0.265 d.0.5305 e.0.66

Last Answer : d. 0.5305

A block A is dropped down a smooth inclined plane, while another identical block B is released for free fall from the same height a.block A will have higher velocity than block B while hitting the ground b.block B will hit the ground earlier. c.both will hit the ground simultaneously d.block A will hit the ground earlier e.107 dynes

Description : A block A is dropped down a smooth inclined plane, while another identical block B is released for free fall from the same height a.block A will have higher velocity than block B while hitting the ... . c.both will hit the ground simultaneously d.block A will hit the ground earlier e.107 dynes

Last Answer : b. block B will hit the ground earlier.

Polar moment of inertia is a.Applicable to masses whereas moment of inertia is applicable to area only b.The moment of inertia for an area ralative to a line or axis which is out the plane of area c.Same as moment of inertia d.The moment of inertia for an area relative to a line or axis parallel to the centroidal axis e.The moment of inertia for an area relative to a line or axis perpendicular to the plane of the area

Description : Polar moment of inertia is a.Applicable to masses whereas moment of inertia is applicable to area only b.The moment of inertia for an area ralative to a line or axis which is out the plane of area ... The moment of inertia for an area relative to a line or axis perpendicular to the plane of the area

Last Answer : e. The moment of inertia for an area relative to a line or axis perpendicular to the plane of the area

The work done in sliding a block of weight of 50 kg up a plane inclined at an angle of 30? to the horizontal so that the block is lifted through 1 m ( a.More than 50 kgm b.50 kgm c.Less than 5 kgm d.15 kgm only e.None of the above

Description : The work done in sliding a block of weight of 50 kg up a plane inclined at an angle of 30? to the horizontal so that the block is lifted through 1 m ( a.More than 50 kgm b.50 kgm c.Less than 5 kgm d.15 kgm only e.None of the above

Last Answer : a. More than 50 kgm

A block of weight 20 kg slides with an initial velocity of 2 m sec down an inclined plane on to a spring of stiffness 10 kg/cm. If the co--efficient of friction is 0.2, angle ? = 30 the ratio of maximum compession of spring, neglecting friction to that while considering friction would be a.More than one b.One c.Less than one d.Depends on the stiffness of spring e.None of the above

Description : A block of weight 20 kg slides with an initial velocity of 2 m sec down an inclined plane on to a spring of stiffness 10 kg/cm. If the co--efficient of friction is 0.2, angle ? = 30 the ratio of ... be a.More than one b.One c.Less than one d.Depends on the stiffness of spring e.None of the above

Last Answer : a. More than one

The principle of conservation of energy cannot be applied in case of a.Flow of heat through a metal b.Ideal flow of water in a pipe c.Simple pendulum d.Sliding of a particle along inclined plane with friction e.A particle moving in gravitational field

Description : The principle of conservation of energy cannot be applied in case of a.Flow of heat through a metal b.Ideal flow of water in a pipe c.Simple pendulum d.Sliding of a particle along inclined plane with friction e.A particle moving in gravitational field

Last Answer : e. A particle moving in gravitational field

The direction of projection for the range of a projectile to be maximum on an inclined plane having angle of inclination 30? to the horizontal, whould be a.45? with horizontal b.30? with vertical c.30? with horizontal d.60? with inclined plane e.45? with inclined plane

Description : The direction of projection for the range of a projectile to be maximum on an inclined plane having angle of inclination 30? to the horizontal, whould be a.45? with horizontal b.30? with vertical c.30? with horizontal d.60? with inclined plane e.45? with inclined plane

Last Answer : b. 30? with vertical

A boy sitting in a rail road car throws a ball straight up into the air. The ball will fall back into his hands when the rail road car is a.moving at constant velocity b.accelerating forward while going around a curve of radius equal to the maximum height attained by the ball c.107 dynes d.accelerating forwardA block A is dropped down a smooth inclined plane, while another identical block B is released for free fall from the same height e.decelerating

Description : A boy sitting in a rail road car throws a ball straight up into the air. The ball will fall back into his hands when the rail road car is a.moving at constant velocity b.accelerating ... inclined plane, while another identical block B is released for free fall from the same height e.decelerating

Last Answer : a. moving at constant velocity

The moment of inertia of a thin ring about an axis perpendicular to plane of ring is a.1/3 Mr3 b.Mr2 c.Mr d.Mr3 e.1/2 Mr3

Description : The moment of inertia of a thin ring about an axis perpendicular to plane of ring is a.1/3 Mr3 b.Mr2 c.Mr d.Mr3 e.1/2 Mr3

Last Answer : b. Mr2

A plane is inclinea at angle ? to horizontal. If a body can just rest on a plane, determine the least force to draw the body up the plance a.W sin2? b.2 W cos2? c.107 dynes d.W cos2? e.2 W sin2?

Description : A plane is inclinea at angle ? to horizontal. If a body can just rest on a plane, determine the least force to draw the body up the plance a.W sin2? b.2 W cos2? c.107 dynes d.W cos2? e.2 W sin2?

Last Answer : a. W sin2?

If the angle of friction is zero a body will experience a.Infinite friction b.Zero friction c.The force of friction will act normal to the plane d.The force of friction will act in the direction of motion e.None of the above

Description : If the angle of friction is zero a body will experience a.Infinite friction b.Zero friction c.The force of friction will act normal to the plane d.The force of friction will act in the direction of motion e.None of the above

Last Answer : b. Zero friction

A body of weight W is resting at a plane inclined at 30? to the horizontal. It is attached to a string making an angle of 60? with horizontal. If the angle of friction be 30? the tension in the string would be a.Zero b.W c.W/2 d.2W e.None of the above

Description : A body of weight W is resting at a plane inclined at 30? to the horizontal. It is attached to a string making an angle of 60? with horizontal. If the angle of friction be 30? the tension in the string would be a.Zero b.W c.W/2 d.2W e.None of the above

Last Answer : c. W/2

The centre of gravity of a plane lamina will not be at its geometrical centre if it is a a.Square b.Equilateral triangle c.Circle d.Rectangle e.Right angled triangle

Description : The centre of gravity of a plane lamina will not be at its geometrical centre if it is a a.Square b.Equilateral triangle c.Circle d.Rectangle e.Right angled triangle

Last Answer : e. Right angled triangle

A particle moves along a rough plane inclined at 30? to the horizontal. The co-efficient of friction between the particle and the plane is 0.1. Its initial velocity is 15 m/sec. The ratio of the velocity of the particle when it move down the plane to that when it move up the plane would be in the regions a.8 ? 10 b.5 ? 7 c.2 ? 3 d.4 ? 6 e.10 ? 13

Description : A particle moves along a rough plane inclined at 30? to the horizontal. The co-efficient of friction between the particle and the plane is 0.1. Its initial velocity is 15 m/sec. The ratio of the velocity of the particle when it move ... be in the regions a.8 ? 10 b.5 ? 7 c.2 ? 3 d.4 ? 6 e.10 ? 13

Last Answer : b. 5 ? 7

The coefficient of friction is a.The tangent of the angle between the normal reaction and direction of limiting friction b.The tangent of the angle between the normal reaction and the resultant of the normal reaction and the limiting friction c.The tangent of the angle of the net resultant force with the direction of motion d.The tangent of the angle between the horizontal plane and the resultant force e.The angle between the normal reaction and the resultant of normal reaction and the limiting friction

Description : The coefficient of friction is a.The tangent of the angle between the normal reaction and direction of limiting friction b.The tangent of the angle between the normal reaction and the resultant ... e.The angle between the normal reaction and the resultant of normal reaction and the limiting friction

Last Answer : a. The tangent of the angle between the normal reaction and direction of limiting friction

If air resistance is neglected, at the mid-point of its swing, the acceleration of the bob of a simple pendulum along its path is always a.Increasing b.Zero c.A cycloid d.Decreasing e.A minimum but not equal to zero

Description : If air resistance is neglected, at the mid-point of its swing, the acceleration of the bob of a simple pendulum along its path is always a.Increasing b.Zero c.A cycloid d.Decreasing e.A minimum but not equal to zero

Last Answer : d. Decreasing