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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

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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

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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

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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

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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

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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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An object of mass m moves horizontally, increasing in speed from `0` to `v` in a time `t`. The power necessary to accelerate the object during this time period

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A 60 HP electric motor lifts an elevator having a maximum total load capacity of `2000 kg`. If the frictional force on the elevator is `4000 N`, the speed of the elevator at full load is close to (take, `1 HP = 746 W and g=10

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For a system to follow the law of conservation of linear momentum during a collision, the condition is I. total external force acting on the system is zero II. total external force acting on the system is finite and time of collision is negligible III. total internal force acting on the system is

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Two identical balls A and B having velocities of `0.5 ms^(-1) and -0.3 ms^(-1)` respectively, collide elastically in one dimension. The velocities of B and A after the collision respectively will

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

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