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If the kinetic energy of a body is direc...

If the kinetic energy of a body is directly proportional to time t, the magnitude of the force acting on the body is

A

directly proportional to `sqrt(t)`

B

inversely proportional to `sqrt(t)`

C

directly proportional to the speed of the body

D

inversely proportional to the speed of the body

Text Solution

Verified by Experts

The correct Answer is:
B, D
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Knowledge Check

  • If the kinetic energy of body is directly proportional to time t , the magnitude of force acting on the body is (i) directly proportional to sqrtt (ii) inversely proportional to sqrtt (iii) directly proportional to the speed of the body. (iv) inversely proportional to the speed of the body.

    A
    (i),(ii)
    B
    (i),(iii)
    C
    (ii),(iv)
    D
    (i),(iv)

  • If kinetic energy of a body is increasing then.

    A
    work done by conservative forces must be positive.
    B
    work done by conservative forces may be positive.
    C
    work done by conservative forces may be zero
    D
    work done by non-conservative forces may be zero

  • The force of freely falling body is directly proportional to

    A
    mass of body
    B
    acceleration of body
    C
    velocity of body
    D
    both (a) and (b)

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