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A partiale of mass m is moving in a circ...

A partiale of mass m is moving in a circular path of radius r such that its centripetal acceleration is varying with time t as `a_c = k^2rt^2, where k is constant. The power delivered to the particle by the forces acting on it is

A

`2pimk^2r^2t`

B

mk^2r^2t

C

(mk^4r^2t^5)/3

D

zero

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BINA LIBRARY-KINEMATICS-II-EXERCISE
  1. Explain why a particle moving with a constant speed along a circular p...

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  2. Can a body with uniform acceleration always move in straight line?

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  3. A body projected with a velocity 25m/s just clears a wall 5m high afte...

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  4. An aeroplane is flying in a hirizontal direction with a velocity of 36...

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  5. A paricle is projected with a velocity of 40ms-1. After two seconds, i...

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  6. Find the angle of projection so that a body when projected has the hor...

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  7. An artifucial satellite is orbiting around the earth with a speed of 4...

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  8. A bomber piane is moving horizontally with a speed of 500ms^-1 and a b...

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  9. The height and horizontal distance of a projectile are y=8t-5t^2m and ...

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  10. A paricle moves in a plane with a constant acceleration in a direction...

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  11. When a body moves with constant speed along a circle

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  12. Which quantity is fixed on object on object which moves in a horizonta...

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  13. A partiale of mass m is moving in a circular path of radius r such tha...

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  14. Which of the following is a vector?

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  15. Identify the vector quantity among the following:

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  16. Which of the following is not a vector quantity?

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  17. Which of the following quantities is a scalar?

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  18. Identify the concept that represents a vector quantity.

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  19. During projectile motion the quantities that remain unchanged are

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  20. The position of a particle moving in xy plane at time t is given by x ...

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