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Choose the correct alternative among the following: ...
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A bullet is fired from a rifle. If the rifle recoils freely, then the kinetic energy of the rifle is ...
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A light and a heavy body have equal momenta. Which one has greater K.E.: ...
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A pendulum bob has a speed of 3 m/s at its lowest position. The pendulum is 0.5 m long. The speed of ...
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A bolt of mass 0.3 kg falls from the ceiling of an elevator moving down with a uniform speed of 7 m/ ...
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A 60 g bullet is fired through a stack of fibre board sheets 200 mm thick. If the bullet approaches ...
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A body of density ‘D’ and volume ‘V’ is lifted through height ‘h’ in a liquid of density ‘d’ (< D). ...
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Power of a water pump is 2 kW. If g = 10 m/s², the amount of water it can raise in one minute to a h ...
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A car of mass m is driven with acceleration a along a straight level road against a constant externa ...
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Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to fri ...
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At t = 0 a 1.0 kg ball is thrown from the top of a tall tower with velocity v = 8i + 9j m/s. The cha ...
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A locomotive of mass m starts moving so that its velocity varies according to the law v = a√s, where ...
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A force F = 5i + 3j newton is applied over a particle which displaces it from its origin to the poi ...
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If the K.E. of a body is increased by 300%, its momentum will increase by: ...
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An open knife edge of mass M is dropped from a height h on a wooden floor. If the blade penetrates s ...
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If we throw a body upwards with velocity of 4 m/s, at what height does its kinetic energy reduce to ...
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A spherical ball of mass 20 kg is stationary at the top of a hill of height 100 m. It slides down a ...
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Calculate the work done, if a wire is loaded by ‘Mg’ weight and the increase in length is ‘l’: ...
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The blades of a windmill sweep out a circle of area A. If the wind of density ρ flows at a velocity ...
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Two identical cylindrical vessels with their bases at the same level each contain a liquid of densit ...
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A spring of spring constant k is stretched by a length x from its natural length and released. What ...
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A toy gun has a spring of force constant k. After charging the spring by compressing it through a di ...
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The potential energy of a particle in a force field is U = A/r^2 - B/r, where A and B are positive c ...
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A block of mass M is hanging over a smooth and light pulley through a light string. The other end of ...
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A particle of mass 100g is thrown vertically upwards with a speed of 5 m/s. The work done by the for ...
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Two bodies A and B have masses 20 kg and 5 kg respectively. Each one is acted upon by a force of 4 k ...
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A spring of mass M and length L (stiffness constant k) is compressed vertically downward against the ...
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From an automatic gun a man fires 360 bullets per minute with a speed of 360 km/hour. If each weighs ...
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A wind powered generator converts wind energy into electrical energy. Assume that the generator conv ...
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A force F = 6i + 2j + 3k acts on a particle and produces a displacement of s = 2i- 3j - xk. If the ...
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The potential energy of a book placed in an almirah is 15 J w.r.t. ground. One person A says that th ...
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The only force acting on a 2 kg body as it moves along the positive x axis has component Fx = –6x N, ...
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A force acts on a 30 g particle in such a way that the position of the particle as a function of tim ...
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The force required to tow a boat at constant velocity is proportional to the speed. If a speed of 4 ...
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A force of F = 2i + 3j + 4k N acts on a body for 4 seconds, producing a displacement of s = (3i + 4j ...
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A car of mass m starts from rest and accelerates so that the instantaneous power delivered to the ca ...
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An elevator of total mass (elevator + passenger) 1800 kg is moving up with a constant speed of 2 m/s ...
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A block of mass 10 kg is moving in x-direction with a constant speed of 10 m/s. It is subjected to a ...
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A block of mass 5 kg is suspended from the end of a vertical spring which is stretched by 10 cm unde ...
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An engine is hauling a train of mass M kg on a level track at a constant speed v m/s. The resistance ...
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