You serve a volleyball with a mass of 2.1kg. The ball leaves your hand with a speed of 30m/s. The ball has _____________ energy. Calculate it.

asked May 8, 2022 4.4k views

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$\\ \rm\Rrightarrow K.E=(1)/(2)mv^2$

$\\ \rm\Rrightarrow K.E=(1)/(2)(2.1)(30)^2$

$\\ \rm\Rrightarrow K.E=(1)/(2)(2.1)(900)$

$\\ \rm\Rrightarrow K.E=450(2.1)$

$\\ \rm\Rrightarrow K.E=945J$

Jacquard answered May 13, 2022

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