Recent questions tagged #mcq

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The kinetic energy of a body of mass `4 kg` and momentum `6 N-s` will

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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For a moving particle (mass `m`, velocity `v`) having a momentum `p`, which one of the following correctly describes the kinetic energy of the

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Two bodies of masses `4 kg and 5 kg` are moving with equal momentum. Then, the ratio of their respective kinetic energies

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A heavy body and a light body have same kinetic energy. Which will have larger linear

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A mass of 5 kg is moving along a circular path of radius 1 m. If the mass moves with 300 rev/min, its kinetic energy (in `J`) would

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Two moving objects `(m_1 > m_2)` having same kinetic energy are stopped by application of equal retarding force. Which object will come to rest at shorter

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A particle which is experiencing a force, is given by `F=3hati - 12hatj`, undergoes a displacement of `d=4hati`. If the particle had a kinetic energy of `3hatJ` at the beginning of the displacement, what is its kinetic energy at the end of the displacement

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A particle moves in one dimension from rest under the influence of a force that varies with the distance travelled by the particle as shown in the figure. The kinetic energy of the particle after it has travelled `3 m`

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When a person lifts a brick above the surface of the earth, then its potential

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A massless spring of spring constant `k`, has extension `y` and potential energy `E`. It is now stretched from `y` to `2y`. The increase in its potential energy

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A bread gives 5 kcal of energy to a boy. How much height he can climbs by using this energy, if his efficiency is 28% and mass is 60

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A stone is projected vertically up to reach maximum height `h`. The ratio of its kinetic energy to its potential energy at a height `4/5h`, will

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A spring of force constant 800 N/m has an extension of `5 cm`. The work done in extending it from `5 cm` to `15 cm`

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A 2 kg block slides on a horizontal floor with a speed of 4 m/s. It strikes a uncompressed spring and compresses it till the block is motionless. The kinetic friction force is 15 N and spring constant is 10000 N/m. The spring compresses

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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`300J` of work is done in sliding a 2 kg block up an inclined plane of height 10 m (taking, `g=10 ms^(-2)`). Work done against friction

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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The graph below represents the potential energy `U` as a function of position r for a particle of mass `m`. If the particle is released from rest at position `r_0`, what will its speed be at position `3r_0`

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A pebble is attached to one end of a string and rotated in a vertical circle. If string breaks at the position of maximum tension, so from the figure shown below, it will break

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What is the ratio of kinetic energy of a particle at the bottom to the kinetic energy at the top, when it just loops a vertical loop of radius

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A man can do work of `600J` in 2 min, then man’s power

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A particle is acted by a constant power. Then, which of the following physical quantity remains

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