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Assume the aerodynamic drag force on a c...

Assume the aerodynamic drag force on a car is proportional to its speed. If the power output from the engine is doubled, then the maximum speed of the car

A

is unchanged

B

increases by a factor of `sqrt(2)`

C

is also doubled

D

increases by a factor of four.

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The correct Answer is:
B
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MOTION-WORK, POWER & ENERGY -Exercise - 1
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  2. A block of mass m slips down an inclined plane as shown in the figure....

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  3. In the given figure, the inclined surface is smooth. The body releases...

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  4. In figure, block A is released from rest, when spring is at its natura...

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  5. A machine, which is 72 percent efficient, uses 36 joules of energy in ...

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  6. A 5 kg block is lifted vertically through a height of 5 metre by a for...

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

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  8. A truck of mass 30,000 kg moves up an inclined plane of slope 1 in 100...

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  9. A particle moves with a velocity v=(5hati-3hatj + 6hatk) ms^(-1) under...

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  10. A body of mass m, accelerates uniformly from rest to V(1) in time t(1)...

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  11. A self-propelled vehicle of mass m, whose engine delivers a constant p...

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  12. A body is moved along a straight line by a machine delivering constant...

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

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  14. Assume the aerodynamic drag force on a car is proportional to its spee...

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  15. An engine develops 10 kW of power. How much time will it take to lift ...

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  16. A block of mass m slides down along the surface of the bowl from the r...

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  17. A mass m is revolving in a vertical circle at the end of a string of l...

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  18. A particle of mass m is rotating by means of a string in a vertical ci...

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  19. A cane filled with water is revolved in a vertical circle of radius 4 ...

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  20. A body is tied up a string of length l and rotated in vertical circle ...

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