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Give the magnitude and direction of the net force acting on(a) A drop of rain falling down with constant speed.(b) A kite skillfully held stationary in the

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Two blocks of masses `m_1, m_2` are connected by light spring on a smooth horizontal surface. The two masses are pulled apart and then released. Prove that the ratio of their acceleration is inversely proportional to their

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A shell of mass 0.020kg is fired by a gun of mass 100kg. If the muzzle speed of the shell is 80m/s, what is the recoil speed of the

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A train runs along an unbanked circular bend of radius 30m at a speed of 54km/hr. The mass of the train is 106kg. What provides the necessary centripetal force required for this purpose? The engine or the rails? What is the angle of banking required to prevent wearing out of the

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Three identical blocks each having a mass m, are pushed by a force F on a frictionless table as shown in figure. What is the acceleration of the blocks? What is the net force on the block P? What force does P apply on Q. What force does Q apply on

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(a) Define impulse. State its S.I. unit? (b) State and prove impulse momentum

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A spring is cut into two equal halves. How is the spring constant of each half

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The momentum of an object is doubled. How does it’s. K.E.

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In which motion momentum changes but K.E. does

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A light body and a heavy body have same linear momentum. Which one has greater

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A shot fired from cannon explodes in air. What will be the changes in the momentum and the kinetic

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Can a body have momentum without

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Obtain an expression for K.E. of a body moving

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What is meant by a positive work, negative work and zero work? Illustrate your answer with

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A body of mass 2kg initially at rest moves under the action of an applied force of 7N on a table with coefficient of kinetic friction = 0.1. Calculate the (1) Work done by the applied force in 10s (2) Work done by the friction in 10s (3) Work done by the net force on the body in

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Derive the expression for the potential energy stored in a

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When an air bubble rises in water, what happens to its potential

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What should be the angle between the force and the displacement for maximum and minimum

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What is work done in holding a 15kg suitcase while waiting for a bus for 15

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A light body and a heavy body have same kinetic energy. Which one has greater linear

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