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

4.50 J

7.50 J

5.06 J

14.06 J

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