Question

A 7 g bullet is fired at 119 m/s how much kinetic energy does it have? Round to the nearest whole

Answer 1

$\begin{gathered} K.E=\frac{1}{2}mv^2 \\ \\ =\frac{1}{2}\times\frac{7}{1000}\times(119)^2 \\ \\ =49.5635J \end{gathered}$

Remember

mass must be in kg.

RESULT,

49.5635J