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Kinetic energy of a particle moving in a...

Kinetic energy of a particle moving in a straight line varies with time `t` as `K = 4t^(2)`. The force acting on the particle

A

is constant

B

is increasing

C

is decreasing

D

first increases and then decreases

Text Solution

Verified by Experts

The correct Answer is:
A
(a) `K=4t^(2) "or " v^(2) prop t^(2)`
`:. " " v prop t`
v varies linearly with time when acceleration or force is constant.
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