Question

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

Answer 1

Hi there,

so we know ,

$K.E = \frac{1}{2} m {v}^{2}$

Also,

we are given:

m = 2.1kg and v = 30m/s

putting the given values in the formula we get :

$K.E = \frac{1}{2} \times 2.1 \times 30$

$K.E = 15 \times 2.1$

$K.E = 31.5J$

Thus, your answer is 31.5 Joules