Work, Energy and Power

Related Questions

• The energy stored in wound watch spring is

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• A uniform chain of length 2m is kept on a table such that a length of 60cm hangs freely from the edge of the table. The total mass of the chain is 4kg. What is the work done in pulling the entire chain on the table

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• A mass of 100g strikes the wall with speed 5m/s at an angle as shown in figure and it rebounds with the same speed. If the contact time is $2 \times {10^{ - 3}}\,\sec$, what is the force applied on the mass by the wall

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• A heavy steel ball of mass greater than 1 kg moving with a speed of 2$m\,{\sec ^{ - 1}}$collides head on with a stationary ping-pong ball of mass less than 0.1 gm. The collision is elastic. After the collision the ping-pong ball moves approximately with speed

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• A body of mass m accelerates uniformly from rest to ${v_1}$ in time ${t_1}$. As a function of time t, the instantaneous power delivered to the body is

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