Related InterviewSolutions

• A child sits stationary at one end of a long trolley moving uniformly with a speed V on a smooth horizontal floor. If the child gets up and runs about on the trolley in any manner, what is the speed of the CM of the (trolley + child) system?
• Which physical quantity is conserved when a planet revolves around the sun ?
• Read each statement below carefully, and state, with reasons, if it is true or false;During rolling, the force of friction acts in the same direction as the direction of motion of the CM of the body.The instantaneous speed of the point of contact during rolling is zero.The instantaneous acceleration of the point of contact during rolling is zero.For perfect rolling motion, work done against friction is zero.A wheel moving down a perfectly frictionless inclined plane will undergo slipping (not rolling) motion.
• What are Equilibrium of rigid bodies ? Give the posses of  Equilibrium.
• What are the Rotational motion of a rigid body ?
• What is Rigid body ?
• Can a body be in equilibrium while in motion ? If yes, give an example.
• An internal force can not change the state of motion of centre of mass of a body. How does the internal force of the brakes bring a vehicle to rest ?
• Define the term Moment of a couple.
• Explain and State the Principle of moments of rotational equilibrium.