A ball of mass \( \mathrm{m} \) moves with speed \( \mathrm{v} \) and it strikes normally with a...

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A ball of mass \( \mathrm{m} \) moves with speed \( \mathrm{v} \) and it strikes normally with a wall and reflected back normally. If its time of contact with wall is math xmlns=http://www.w3.org/1998/Math/MathML class=wrs_chemistrymi mathvariant=normalt/mi/math, then find force exerted by ball on the wall.
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