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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

4.50 J

B

7.50 J

C

5.06 J

D

14.06 J

Text Solution

Verified by Experts

The correct Answer is:
C
Area under F – t curve = 4.5 kg m/s `" " KE = 1/2 (2) ((4.5)/(2))^(2) = 5.06 J`
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