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In a projectile motion, power of the gra...

In a projectile motion, power of the gravitational force

A

Is constant throughout

B

Is negative for first half, zero at topmost point and positive for rest half

C

Varies linearly with time

D

Is positive for complete path

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The correct Answer is:
B, C
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PHYSICS GALAXY - ASHISH ARORA-WORK, ENERGY AND POWER-MCQ
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  2. A heavy particle is suspended by a string of length 60 cm from a fixed...

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  3. Work done by the conservative force on a system is equal to :

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  4. Select the correct alternative(s).

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  5. Work done by a force on an object is zero, if

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  6. A particle moves in a straight line with constant acceleration under ...

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  7. Kinetic energy of a particle moving in a straight line is proportional...

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  8. In a projectile motion, power of the gravitational force

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  9. A person applies a constant force vecF on a particle of mass m and fin...

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  10. One end of a light spring of spring constant k is fixed to a wall and ...

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  11. A block of mass 2 kg is hanging over a smooth and light pulley through...

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  12. The spring is compressed by a distance a and released. The block again...

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  13. The potential energy U in joule of a particle of mass 1 kg moving in x...

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  14. A block is suspended by an ideal spring of force constant force F and ...

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  15. For a curved track of radius R, banked at angle theta

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  16. A single conservative force F(x) acts on a particle that moves along t...

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  17. The potential energy of a particle of mass 1 kg in a conservative fiel...

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  18. In the adjacent figure a uniform rod of length L and mass m is kept at...

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