Question

A ball of mass 0.5 kg has 100 j of kinetic energy what is the velocity of the ball​

Answer 1

$\huge{\mathcal{\blue{Answer}}}$

$k = \frac{1}{2} mv {}^{2} \\ 100j = \frac{1}{2} \times 0.5 \times v {}^{2} \\ \frac{100j \times 2}{0.5} = v {}^{2} \\ 400 = v {}^{2}$

$\huge{\mathcal{\blue{v=20m/s}}}$