If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either (A) Meet in a point (B) Be all parallel (C) At least two of them must meet (D) All the above are correct

If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either
(A) Meet in a point
(B) Be all parallel
(C) At least two of them must meet
(D) All the above are correct
by

1 Answer

Answer :

(D) All the above are correct
by

Related questions

If a rigid body is in equilibrium under the action of three forces, then (A) These forces are equal (B) The lines of action of these forces meet in a point (C) The lines of action of these forces are parallel (D) Both (B) and (C) above

Description : If a rigid body is in equilibrium under the action of three forces, then  (A) These forces are equal  (B) The lines of action of these forces meet in a point  (C) The lines of action of these forces are parallel  (D) Both (B) and (C) above

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

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

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

According to law of triangle of forces (A) Three forces acting at a point will be in equilibrium (B) Three forces acting at a point can be represented by a triangle, each side being proportional to force (C) If three forces acting upon a particle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium (D) If three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two

Description : According to law of triangle of forces  (A) Three forces acting at a point will be in equilibrium  (B) Three forces acting at a point can be represented by a triangle, each side ... point are in equilibrium, each force is proportional to the sine of  the angle between the other two 

Last Answer : (C) If three forces acting upon a particle are represented in magnitude and direction by the  sides of a triangle, taken in order, they will be in equilibrium

According to Lami's theorem (A) Three forces acting at a point will be in equilibrium (B) Three forces acting at a point can be represented by a triangle, each side being proportional to force (C) If three forces acting upon a particle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium (D) If three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two

Description : According to Lami's theorem (A) Three forces acting at a point will be in equilibrium (B) Three forces acting at a point can be represented by a triangle, each side being proportional to ... point are in equilibrium, each force is proportional to the sine of the angle between the other two

Last Answer : Answer: Option D

A single force and a couple acting in the same plane upon a rigid body (A) Balance each other (B) Cannot balance each other (C) Produce moment of a couple (D) Are equivalent

Description : A single force and a couple acting in the same plane upon a rigid body  (A) Balance each other  (B) Cannot balance each other  (C) Produce moment of a couple  (D) Are equivalent 

Last Answer : (B) Cannot balance each other 

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

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 single force and a couple acting in the same plane upon a rigid body?

Description : A single force and a couple acting in the same plane upon a rigid body?

Last Answer : A single force and a couple acting in the same plane upon a rigid body cannot balance each other.

Which is the correct statement about law of polygon of forces? (A) If any number of forces acting at a point can be represented by the sides of a polygon taken in order, then the forces are in equilibrium (B) If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon, then the forces are in equilibrium (C) If a polygon representing forces acting at a point is closed then forces are in equilibrium (D) If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are in equilibrium

Description : Which is the correct statement about law of polygon of forces?  (A) If any number of forces acting at a point can be represented by the sides of a polygon taken  in order, then the ... direction and magnitude by  the sides of a polygon taken in order, then the forces are in equilibrium 

Last Answer : (D) If any number of forces acting at a point can be represented in direction and magnitude by  the sides of a polygon taken in order, then the forces are in equilibrium 

If a rigid body is in equilibrium under the action of three forces, then?

Description : If a rigid body is in equilibrium under the action of three forces, then?

Last Answer : If a rigid body is in equilibrium under the action of three forces, then the lines of action of these forces meet in a point, the lines of action of these forces are parallel.

two forces acting at a joint are not along the straight line, then for the equilibrium of the joint (A) One of the forces must be zero (B) Each force must be zero (C) Forces must be equal and of the same sign (D) Forces must be equal in magnitude but opposite in sign

Description : two forces acting at a joint are not along the straight line, then for the equilibrium of the joint (A) One of the forces must be zero (B) Each force must be zero (C) Forces must be equal and of the same sign (D) Forces must be equal in magnitude but opposite in sign

Last Answer : (B) Each force must be zero

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 

A number of forces acting at a point will be in equilibrium if (A) Their total sum is zero (B) Two resolved parts in two directions at right angles are equal (C) Sum of resolved parts in any two perpendicular directions are both zero (D) All of them are inclined equally

Description : A number of forces acting at a point will be in equilibrium if (A) Their total sum is zero (B) Two resolved parts in two directions at right angles are equal (C) Sum of resolved parts in any two perpendicular directions are both zero (D) All of them are inclined equally

Last Answer : (C) Sum of resolved parts in any two perpendicular directions are both zero

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 

For a body to be in equilibrium, which of the following conditions must exist? w) no forces may be acting on the body. x) the body must be accelerating. y) the velocity of the body must be zero. z) the sum of the forces acting on the body must be equal to zero.

Description : For a body to be in equilibrium, which of the following conditions must exist? w) no forces may be acting on the body. x) the body must be accelerating. y) the velocity of the body must be zero. z) the sum of the forces acting on the body must be equal to zero. 

Last Answer : ANSWER: Z -- THE SUM OF THE FORCES ACTING ON THE BODY MUST BE EQUAL TO ZERO.

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

Number of unknown internal forces in each member of a rigid jointed plane frame is (A) 1 (B) 2 (C) 3 (D) 6

Description : Number of unknown internal forces in each member of a rigid jointed plane frame is (A) 1 (B) 2 (C) 3 (D) 6

Last Answer : (C) 3

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

If three forces acting in different planes can be represented by a triangle, these will be in (A) Non-equilibrium (B) Partial equilibrium (C) Full equilibrium (D) None of the above

Description : If three forces acting in different planes can be represented by a triangle, these will be in  (A) Non-equilibrium  (B) Partial equilibrium  (C) Full equilibrium  (D) None of the above 

Last Answer : (A) Non-equilibrium 

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 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

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

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 

A number of forces acting at a point will be in equilibrium if?

Description : A number of forces acting at a point will be in equilibrium if?

Last Answer : The sum of the resolved parts in any two perpendicular directions are both zero

Buoyant force is (A) Resultant force acting on a floating body (B) Equal to the volume of liquid displaced (C) Force necessary to keep a body in equilibrium (D) The resultant force on a body due to the fluid surrounding it

Description : Buoyant force is (A) Resultant force acting on a floating body (B) Equal to the volume of liquid displaced (C) Force necessary to keep a body in equilibrium (D) The resultant force on a body due to the fluid surrounding it

Last Answer : Answer: Option D

At either end of a plane frame, maximum number of possible transverse shear forces, are (A) One (B) Two (C) Three (D) Four

Description : At either end of a plane frame, maximum number of possible transverse shear forces, are (A) One (B) Two (C) Three (D) Four

Last Answer : (A) One

A compound truss may be formed by connecting two simple rigid frames, by (A) Two bars (B) Three bars (C) Three parallel bars (D) Three bars intersecting at a point

Description : A compound truss may be formed by connecting two simple rigid frames, by  (A) Two bars  (B) Three bars  (C) Three parallel bars  (D) Three bars intersecting at a point 

Last Answer : (B) Three bars 

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

Two non-collinear parallel equal forces acting in opposite direction (A) Balance each other (B) Constitute a moment (C) Constitute a couple (D) Constitute a moment of couple

Description : Two non-collinear parallel equal forces acting in opposite direction  (A) Balance each other  (B) Constitute a moment  (C) Constitute a couple  (D) Constitute a moment of couple 

Last Answer : (C) Constitute a couple 

For a floating body to be in equilibrium (A) Meta centre should be above e.g.(B) Centre of buoyancy and e.g. must lie on same vertical plane (C) A righting couple should be formed (D) All of the above

Description : For a floating body to be in equilibrium (A) Meta centre should be above e.g . (B) Centre of buoyancy and e.g. must lie on same vertical plane (C) A righting couple should be formed (D) All of the above

Last Answer : Answer: Option D

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.

Description : 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.

Last Answer : c. Non-coplanar nonconcurrent forces

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.

Independent displacement components at each joint of a rigid-jointed plane frame are (A) Three linear movements (B) Two linear movements and one rotation (C) One linear movement and two rotations (D) Three rotations

Description : Independent displacement components at each joint of a rigid-jointed plane frame are (A) Three linear movements (B) Two linear movements and one rotation (C) One linear movement and two rotations (D) Three rotations

Last Answer : (B) Two linear movements and one rotation

If an object is in a state of equilibrium, what can be said about all of the forces acting on the object?

Description : If an object is in a state of equilibrium, what can be said about all of the forces acting on the object?

Last Answer : ANSWER: THE SUM OF ALL FORCES ACTING ON THE OBJECT IS ZERO

The operation of resection involves the following steps 1. Rough orientation of the plane table 2. The three lines form a triangle of error 3. Drawing lines back through the three control points 4. Select a point in the triangle of error such that each ray is equally rotated either clockwise or anti clockwise 5. The points obtained by three rays are the correct location. The correct sequence is (A) 1, 3, 2, 4, 5 (B) 1, 2, 3, 4, 5 (C) 1, 4, 3, 2, 5 (D) 1, 3, 2, 4, 5

Description : The operation of resection involves the following steps 1. Rough orientation of the plane table 2. The three lines form a triangle of error 3. Drawing lines back through the three control points 4. Select a point in the triangle of error ... 2, 3, 4, 5 (C) 1, 4, 3, 2, 5 (D) 1, 3, 2, 4, 5

Last Answer : (A) 1, 3, 2, 4, 5

A member is balanced at its end by two inclined members carrying equal forces. For equilibrium the angle between the inclined bars must be (A) 3° (B) 45° (C) 90° (D) 120°

Description : A member is balanced at its end by two inclined members carrying equal forces. For equilibrium  the angle between the inclined bars must be  (A) 3°  (B) 45°  (C) 90°  (D) 120° 

Last Answer : (D) 120° 

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

The algebraic sum of moments of the forces forming couple about any point in their plane is (A) Equal to the moment of the couple (B) Constant (C) Both of above are correct (D) Both of above are wrong

Description : The algebraic sum of moments of the forces forming couple about any point in their plane is  (A) Equal to the moment of the couple  (B) Constant  (C) Both of above are correct  (D) Both of above are wrong 

Last Answer : (A) Equal to the moment of the couple 

According to principle of transmissibility of forces, the effect of a force upon a body is (A) Maximum when it acts at the center of gravity of a body (B) Different at different points in its line of action (C) The same at every point in its line of action (D) Minimum when it acts at the C.G. of the body

Description : According to principle of transmissibility of forces, the effect of a force upon a body is (A) Maximum when it acts at the center of gravity of a body (B) Different at different points in its line of action ... at every point in its line of action (D) Minimum when it acts at the C.G. of the body

Last Answer : (C) The same at every point in its line of action

Buoyant force is (A) The resultant force acting on a floating body (B) The resultant force on a body due to the fluid surrounding it (C) Equal to the volume of liquid displaced (D) The force necessary to maintain equilibrium of a submerged body

Description : Buoyant force is (A) The resultant force acting on a floating body (B) The resultant force on a body due to the fluid surrounding it (C) Equal to the volume of liquid displaced (D) The force necessary to maintain equilibrium of a submerged body

Last Answer : Answer: Option B

A force acting on a body may (A) Introduce internal stresses (B) Balance the other forces acting on it (C) Retard its motion (D) All of the above

Description : A force acting on a body may  (A) Introduce internal stresses  (B) Balance the other forces acting on it  (C) Retard its motion  (D) All of the above 

Last Answer : (D) All of the above 

Degree of static indeterminacy of a rigid-jointed plane frame having 15 members, 3 reaction components and 14 joints is (A) 2 (B) 3 (C) 6 (D) 8

Description : Degree of static indeterminacy of a rigid-jointed plane frame having 15 members, 3 reaction components and 14 joints is (A) 2 (B) 3 (C) 6 (D) 8

Last Answer : (C) 6

A rigid-jointed plane frame is stable and statically determinate if (A) (m + r) = 2j (B) (m + r) = 3j (C) (3m + r) = 3j (D) (m + 3r) = 3j Where m is number of members, r is reaction components and j is number of joints

Description : A rigid-jointed plane frame is stable and statically determinate if (A) (m + r) = 2j (B) (m + r) = 3j (C) (3m + r) = 3j (D) (m + 3r) = 3j Where m is number of members, r is reaction components and j is number of joints

Last Answer : (C) (3m + r) = 3j

Two non-collinear parallel equal forces acting in opposite direction?

Description : Two non-collinear parallel equal forces acting in opposite direction?

Last Answer : Two non-collinear parallel equal forces acting in opposite direction constitute a couple.

The center of pressure of a surface subjected to fluid pressure is the point (A) On the surface at which resultant pressure acts (B) On the surface at which gravitational force acts (C) At which all hydraulic forces meet (D) Similar to metacentre

Description : The center of pressure of a surface subjected to fluid pressure is the point (A) On the surface at which resultant pressure acts (B) On the surface at which gravitational force acts (C) At which all hydraulic forces meet (D) Similar to metacentre

Last Answer : Answer: Option A

A rigid square plate ABCD of unit side rotates in its own plane about the middle-point of CD until the new position of A coincides with -Maths 9th

Description : A rigid square plate ABCD of unit side rotates in its own plane about the middle-point of CD until the new position of A coincides with -Maths 9th

Last Answer : answer:

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

Pick up the correct statement from the following: (A) The surface defined by the locus of points having same phase, is called a wave front (B) The wave whose surface of constant phase are parallel planes, is known as a plane wave (C) The relative phase difference between the waves is important and not the absolute phase of a point on the wave (D) All of these

Description : Pick up the correct statement from the following: (A) The surface defined by the locus of points having same phase, is called a wave front (B) The wave whose surface of constant phase are parallel planes, ... waves is important and not the absolute phase of a point on the wave (D) All of these

Last Answer : Answer: Option D