For the path PQR in a conservative force field the amounts work done in carrying a body from P to Q and from Q to R are 5 Joule and 2 Joule respectively. The work done in carrying the body from P to R will be

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Important Questions on Work, Energy and Power

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Beta Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise (Conceptual Questions)>Q 35

The mass of a bucket full of water is 15 kg. It is being pulled up from a 15m deep well. Due to a hole in the bucket 6 kg water flows out of the bucket. The work done in drawing the bucket out of the well will be (g = 10m/s²) :

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Beta Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise (Conceptual Questions)>Q 36

A uniform chain of length L and mass M is lying on a smooth table and

\frac{2}{3}

of its length is hanging down over the edge of the table. If g is the acceleration due to gravity, the work done to pull the hanging part on the table is :-

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Beta Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise (Conceptual Questions)>Q 37

A

10 kg

satellite completes one revolution around the earth at a height of

100 km

in

108 minutes

. The work done by the gravitational force of earth will be -

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Beta Question Bank for Medical: Physics>Chapter 8 - Work, Energy and Power>Exercise (Conceptual Questions)>Q 38

A particle is moved from (0, 0) t o (a, a) under a force $\vec{F} = (3 \hat{i} + 4 \hat{j})$ from two paths. Path 1 is OP and path 2 is OQP. Let W₁ and W₂ be the work done by this force in these two paths. Then :