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Velocity-time graph of a particle of mas...

Velocity-time graph of a particle of mass (2 kg) moving in a straight line is as shown in Fig. 9.20. Find the word done by all the forces acting on the particle. .

A

`400 J`

B

`-400 J`

C

`-200 J`

D

`200 J`

Text Solution

Verified by Experts

The correct Answer is:
B
(b) Work done by all forces = change in kinetic energy
`=(1)/(2)m(v_(f)^(2)-v_(i)^(2))=(1)/(2)xx2(0-400)=-400J`
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DC PANDEY ENGLISH-WORK, ENERGY AND POWER-CHECK POINT 6.2
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  10. A block of mass 20 kg is moving in x-direction with a constant speed o...

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  11. Velocity-time graph of a particle of mass (2 kg) moving in a straight ...

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  14. A body of mass 5 kg is raised vertically to a height of 10 m by a forc...

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  16. A block of mass 2 kg is dropped from a height of 40 cm on a spring who...

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