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A block of mass 2 kg is free to move alo...

A block of mass `2 kg` is free to move along the `x`-axis. It at rest and from `t = 0`onwards it is subjected to a time-dependent force `F(t)` in the `x` direction. The force `F(t)` varies with `t` as shown in the figure. The kinetic energy of the block after `4.5` seconds is

A

`4.50J`

B

`7.50J`

C

`5.06J`

D

`14.06J`

Text Solution

Verified by Experts

The correct Answer is:
C
Area under `F-t` curve `=4.5kgms^-1`
`KE=1/2(2)(4.5/2)^2=5.06J`
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