Question

A player kicks the ball of mass 250g at the centre of the field. The leaves his foot with the speed of 10m/s find the work done by the player on the ball?

Answer 1

$\sf \huge \fcolorbox{red}{pink}{Solution :)}$

Given ,

Mass of the ball (m) = 250 g or 0.25 kg

Final Speed of ball (v) = 10 m/s

We know that ,

$\large \fcolorbox{yellow}{s}{Work done = Change in kinetic energy </p><p>}$

Here ,

Initial kinetic energy is 0

Final kinetic energy is (1/2) × m(v)²

Substitute the known values , we get

$\sf \mapsto Work \: done = \frac{1}{2} \times 0.25 \times {(10)}^{2} \\ \\ \sf \mapsto Work \: done = \frac{25 \times 100}{2 \times 100} \\ \\ \sf \mapsto Work \: done = 12.5 \: \: joule$

Hence , work done by the player on the ball is 12.5 joule

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