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LAKHMIR SINGH & MANJIT KAUR-WORK AND ENERGY-Exercise
- A boy throws a rubber ball vertically upwards. What type of work, posi...
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- Write the formula for work done on a body when the body moves at an an...
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- How does the kinetic energy of a moving body depend on its (i) speed, ...
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- What is meant by positive work, negative work and zero work ? Illustra...
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- A ball of mass 200 g falls from a height 5 metres. What is its kinetic...
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- Find the momentum of a body of mass 100 g having a kinetic energy of 2...
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- Two objects having equal masses are moving with uniform velocities of ...
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- A body of 2 kg falls from rest. What will be its kinetic energy during...
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- On a level road, a scooterist applies brakes to slow down from a speed...
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- A man drops a 10 kg rock from the top of a 5 m ladder. What is its spe...
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- Calculate the work done by the brakes of a car of mass 1000 kg when it...
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- A body of mass 100 kg is lifted up by 10 m. Find : (i) the amount of...
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- A boy weighing 50 kg climbs up a vertical height of 100 m. Calculate t...
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- What is the work done by a constant force ? When is it positive, negat...
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- To what height should a box of mass 150 kg be lifted, so that its pote...
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- A body of mass 2 kg is thrown vertically upwards with an initial veloc...
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- How much work is done when a force of 1 N moves a body through a dista...
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- A car is being driven by a force of 2.5 xx 10^(10) N. Travelling at a...
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- Explain by a an example that a body may possess energy when it is not ...
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- (a) On what factors does the gravitational potential energy of a body ...
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