Description : The center of gravity of a triangle lies at the point of (A) Concurrence of the medians (B) Intersection of its altitudes (C) Intersection of bisector of angles (D) Intersection of diagonals
Last Answer : (A) Concurrence of the medians
Description : Center of gravity of a solid cone lies on the axis at the height (A) One-fourth of the total height above base (B) One-third of the total height above base (C) One-half of the total height above base (D) Three-eighth of the total height above the base
Last Answer : (A) One-fourth of the total height above base
Description : Center of gravity of a thin hollow cone lies on the axis at a height of (A) One-fourth of the total height above base (B) One-third of the total height above base (C) One-half of the total height above base (D) Three-eighth of the total height above the base
Last Answer : (B) One-third of the total height above base
Description : The center of gravity of a uniform lamina lies at (A) The center of heavy portion (B) The bottom surface (C) The midpoint of its axis (D) All of the above
Last Answer : (C) The midpoint of its axis
Description : Center of gravity of a thin hollow cone lies on the axis at a height of?
Last Answer : Center of gravity of a thin hollow cone lies on the axis at a height of one-third of the total height above base.
Description : Center of gravity of a solid cone lies on the axis at the height?
Last Answer : Center of gravity of a solid cone lies on the axis at the height one-fourth of the total height above base.
Description : The rotational effect of a force on a body about an axis of rotation is described in terms of the (1) Centre of gravity (2) Centripetal force (3) Centrifugal force (4) Moment of force
Last Answer : (4) Moment of force Explanation: The rotational effect of a force on a body about an axis of rotation is described in terms of the Moment of force.
Description : An incident ray comes in parallel to the principle axis of a concave mirror. Is it reflected: w) back along the incident ray x) at 30 degrees to incident ray y) through the focal point z) through the center of curvature
Last Answer : ANSWER: Y -- THROUGH THE FOCAL POINT
Description : The center of gravity of a triangle lies at the point of?
Last Answer : The center of gravity of a triangle lies at the point of concurrence of the medians.
Description : If the particle of a body vibrate along a circular arc, whose centre lies on the axis of the shaft then the body is said to have A) Transverse vibration B) Longitudinal vibration C) Torsional vibration D) None of the above
Last Answer : C) Torsional vibration
Description : Metacentre is the point of intersection of (A) Vertical upward force through e.g. of body and center line of body (B) Buoyant force and the center line of body (C) Midpoint between e.g. and center of buoyancy (D) All of the above
Last Answer : Answer: Option B
Description : The center of gravity of a uniform lamina lies at?
Last Answer : The center of gravity of a uniform lamina lies at the mid point of its axis.
Description : ______ is the perpendicular distance between point of application of force and axis of rotation. (1) Moment arm (2) Moment of Inertia (3) Altitude (4) Base
Last Answer : (1) Moment arm Explanation: The magnitude of the moment of force acting about a point or axis is directly proportional to the distance of the force from the point or axis.
Description : The moment of inertia of a body does not depend upon its – (1) axis of rotation (2) angular velocity (3) form of mass (4) distribution of mass
Last Answer : (2) angular velocity Explanation: Moment of inertia is the mass property of a rigid body that determines the torque needed for a desired angular acceleration about an axis of rotation. Moment of inertia ... of moments of inertia of the masses making up the whole object, under the same conditions.
Description : A larger force on a rotating body results in larger _______. (1) Mass (2) Torque (3) Axis of rotation (4) Centre of mass
Last Answer : (3) Axis of rotation
Description : The moment of inertia of a body does not depend upon its (1) axis of rotation (2) angular velocity (3) form of mass (4) distribution of mass
Last Answer : angular velocity
Description : The rise of liquid along the walls of a revolving cylinder about the initial level is __________ the depression of the liquid at the axis of rotation. (A) Same as (B) Less than (C) More than (D) None of these
Last Answer : Answer: Option A
Description : Pick up the correct statement from the following: (A) For channels, the shear centre does not coincide its centroid (B) The point of intersection of the bending axis with the cross section ... shear centre coincides with the centroid of the cross section of the beam (D) All the above
Last Answer : (D) All the above
Description : The centre of gravity of a sprinter during the race lies – (1) Ahead of his feet (2) Behind his feet (3) At the centre of the body (4) To the left side of the body
Last Answer : (1) Ahead of his feet Explanation: Running is a means of terrestrial locomotion allowing humans and other animals to move rapidly on foot. It is simply defined in athletics terms as a gait in ... are kept mostly straight and the center of gravity vaults over the legs in an inverted pendulum fashion.
Description : The centre of gravity of a sprinter during the race lies (1) ahead of his feet (2) behind his feet (3) at the centre of the body (4) to the left side of the body
Last Answer : ahead of his feet
Description : When a mass is rotating in a plane about a fixed point, its angular momentum is directed along: (1) the tangent to the orbit (2) a line perpendicular to the plane of rotation (3) the line making an angle of 45° to the plane of rotation (4) the radius
Last Answer : (2) a line perpendicular to the plane of rotation
Description : Which of the following is not a characteristic feature of yield lines? [ A ] Yield lines end at a slab boundary [ B ] Yield lines are of parabolical shape [ C ] Axes of rotation generally lie along the lines of supports [ D ] None of the above.
Last Answer : [ B ] Yield lines are of parabolical shape
Description : Point where all weight of object acts is called A. central point B. center of gravity C. edge D. center of mass
Last Answer : center of gravity
Description : What is the equation of the line joining the origin with the point of intersection of the lines 4x + 3y = 12 and 3x + 4y = 12 ? -Maths 9th
Last Answer : (b) (5, 6)Let the foot of the perpendicular be M(x1, y1) Slope of line AB, i.e., y = -x + 11 = -1 Slope of line PM = \(rac{y_1-3}{x_1-2}\)Now, PM ⊥ AB⇒ \(\bigg(rac{y_1-3}{x_1-2}\bigg)\) x - ... get 2x1 = 10 ⇒ x1 = 5 Putting x1 in (ii), we get y1 = 6. ∴ Required foot of the perpendicular M is (5, 6).
Description : A line passes through the point of intersection of the lines 100x + 50y – 1 = 0 and 75x + 25y + 3 = 0 and makes equal intercepts on the axes. -Maths 9th
Last Answer : (d) x + 2y = 2Let the required equation make intercept on x-axis = 2a ⇒ intercept made on y-axis = a ∴ Eqn of the given line in the intercept from:\(rac{x}{2a}+rac{y}{a}=1\) ...(i)Since the line ... 1 ⇒ a = 1.∴ Required equation of line : \(rac{x}{2 imes1}+rac{y}{1}=1\) ⇒ x + 2y = 2.
Description : Find the equation of the line which passes through the point of intersection of the lines 2x – y + 5 = 0 -Maths 9th
Last Answer : (a) 45º 3x + y - 7 = 0 ⇒ y = -3x + 7 ⇒ Slope (m1) = -3 x + 2y + 9 = 0 ⇒ y = \(rac{-x}{2}\) - \(rac{9}{2}\) ⇒ Slope (m2) = \(-rac{1}{2}\)If θ is the angle between the given lines, then tan θ = \(\ ... \bigg|rac{-rac{5}{2}}{1+rac{3}{2}}\bigg|\)= \(\bigg|rac{-rac{5}{2}}{rac{5}{2}}\bigg|\) = 1∴ θ = 45°.
Description : An intersection is a point where two or more lines/curves meet or cross. How many intersections are there in the figure given below?
Last Answer : 17
Description : You are walking to the city of Truth but don't know where to go. You reach an intersection and you know that one of them leads to the city of Truth and the other to the city of Lies but you don't ... either cities, you don't know but he offers to help you, what do you ask or demand of him? -Riddles
Last Answer : 'Take me to your home!' You say.
Description : In a purely cohesive soil, the critical centre lies at the intersection of (A) Perpendicular bisector of slope and the locus of the centre (B) Perpendicular drawn at 1/3rd slope from toe and the ... C) Perpendicular drawn at 2/3rd slope from toe and the locus of the centre (D) Directional angles
Last Answer : Answer: Option D
Description : We always see the same lace of the moon, because - (1) It is smaller than the earth (2) It revolves on its axis in a direction opposite to that of the earth (3) It takes equal time for revolution ... the earth and rotation on its own axis (4) It rotates at the same speed as the earth around the sun
Last Answer : (3) It takes equal time for revolution around the earth and rotation on its own axis Explanation: It is tidal locking that causes the synchronous rotation which causes the Moon to present "just one side ... to revolve (orbit) around the Earth. So it maintains a "constant face" in our direction.
Description : If in a motion, the axis of the rotation does not pass through the object, then the motion is called - (1) Spin motion (2) Oscillatory motion (3) Translatory motion (4) Orbital motion
Last Answer : (4) Orbital motion Explanation: The axis of the rotation does not pass through the object in orbital motion. It involves the quantum mechanical motion of rigid particles (such as electrons) about some other mass, or about them selves.
Description : If in a motion, the axis of the rotation passes through an object, then the motion is called. (1) Orbital motion (2) Circulatory motion (3) Spin motion (4) Oscillatory motion
Last Answer : (3) Spin motion Explanation: A rotation is a circular movement of an object around a center (or point) of rotation A threedimensional object al ways rotates around an imaginary line called a rotation axis.
Description : Moment of force depends upon A. magnitude of force B. perpendicular distance of force from pivot C. both A and B D. axis of rotation
Last Answer : both A and B
Description : We always see the same face of the moon, because (1) it is smaller than the earth (2) it revolves on its axis in a direction opposite to that of the earth (3) it takes equal time for revolution around the earth and rotation on its own axis (4) it rotates at the same speed as the earth around the sun
Last Answer : it takes equal time for revolution around the earth and rotation on its own axis
Description : Why the Earth is having its own atmosphere? (1) Winds (2) Clouds (3) Gravity (4) Rotation of the Earth
Last Answer : (3) Gravity Explanation: Due to gravity, our Earth has an atmosphere, Gravity causes the gases to be held close to the earth instead of escaping into outer space.
Description : The atmospheric air is held to the Earth by – (1) gravity (2) winds (3) clouds (4) rotation of the Earth
Last Answer : (1) gravity Explanation: The atmosphere is an ocean of air held in place by gravity, extending from the surface to an altitude of hundreds of kilometers, the edge of space. Energy from the sun heating the air and land surface to different degrees, drives atmospheric circulation.
Description : The atmospheric air is held to the Earth by : (1) gravity (2) winds (3) clouds (4) rotation of the Earth
Last Answer : 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
Description : Center of percussion is (A) The point of C.G. (B) The point of metacentre (C) The point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis (D) Point of suspension
Last Answer : (C) The point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
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
Description : The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as (A) Meta center (B) Center of pressure (C) Center of buoyancy (D) Center of gravity
Description : The imaginary line passing through the intersection of cross hairs and the optical centre of the objective, is known as (A) Line of sight (B) Line of collimation (C) Axis of the telescope (D) None of these
Last Answer : (B) Line of collimation
Description : In a theodolite the line passing through the intersection of the horizontal and vertical cross hairs and the optical centre of the object glass and its continuation, is known as (a) Horizontal axis (b) Vertical axis (c) Line of collination (d) Line of sight (e) Either of c or d above*
Last Answer : e) Either of c or d above*
Description : Pick up the incorrect statement from the following: (A) The C.G. of a circle is at its center (B) The C.G. of a triangle is at the intersection of its medians (C) The C.G. of a ... intersection of its diagonals (D) The C.G. of a semicircle is at a distance of r/2 from the center
Last Answer : (D) The C.G. of a semicircle is at a distance of r/2 from the center
Description : The speed at which the shaft runs so that the additional deflection from the axis of rotation of the shaft becomes infinite, is known as _________ * 1 point (A) Whirling speed (B) Rotational speed (C) Stabilizing speed (D) Reciprocating speed
Last Answer : (A) Whirling speed
Description : When a body moves round a fixed axis it will have a.A motion of rotation and translation b.A circular motion c.A rotary motion d.A translatory motion e.A swinging motion
Last Answer : b. A circular motion
Description : The moment of inertia of a body does not depend upon a.The angular velocity of the body b.Mass of the body c.The distribution of mass in the body d.The axis of rotation of the body e.None of the above
Last Answer : a. The angular velocity of the body
Description : If the perpendicular distance of a point P from the X-axis is 5 units and the foot of the perpendicular lies on the negative direction of X-axis, then the point P has -Maths 9th
Last Answer : (d) We know that, the perpendicular distance of a point from the X-axis gives y-coordinate of that point. Here, foot of perpendicular lies on the negative direction of X-axis, so perpendicular distance can be measure in II quadrant or III quadrant. Hence, the point P has y-coordinate = 5 or -5.