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A car of mass m is driven with accelerat...

A car of mass `m` is driven with acceleration `a` along a straight level road against a constant external resistive force R. When the velocity of the car V, the rate at which the engine of the car is doing work will be

A

R.v

B

ma.v

C

(R+ma).v

D

(ma-R).v

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SL ARORA-Work, Energy and power-EXERCISE
  1. A car of mass 1000kg accelerates uniformly from rest to a velocity of ...

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  2. A constant force F is pushing a 5 kg mass on a horizontal surface at a...

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  3. A car of mass m is driven with acceleration a along a straight level r...

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  4. Power applied to a particle varices with time as P =(3t^(2)-2t + 1) wa...

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  5. An electric pump is used to fill an overhead tank of capacity 9m3 kept...

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  6. In an inelastic collision, what is conserved

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  7. A bullet is fired and gets embedded in a block kept on table. If table...

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  8. A particle of mass m1 moves with velocity v1 and collides with another...

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  9. A body of mass M(1) collides elastically with another mass M(2) at res...

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  10. A body of mass 5 kg moving with a velocity 10 m/s collides with anothe...

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  11. A body is moving with a velocity v , breaks up into two equal parts. O...

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  12. A bomb is kept stationary at a point. It suddenly explodes into two fr...

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  13. A particle of mass m having velocity v moving towards north collides w...

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  14. A mass3in,initially at rest at the origin, explodes into three fragmen...

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  15. A body of mass 4m at rest explodes into three pieces. Two of the piece...

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  16. A bullet hits and gets embedded in a solid block resting on a friction...

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  17. The cofficient of restitution e for a perfectly elastic collision is

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  18. A ball falls from rest from a height h onto a floor, and rebounds to a...

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  19. A ball is dropped from a height h on to a floor . If the cofficient of...

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  20. A ball falls vertically onto a floor with momentum p and then bounces ...

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