Question

type the correct answer in the box. whats the kinetic energy of the object? use $ke=\frac{1}{2}mv^{2}$. erica is competing in the shot - put event at a track meet. she hurls a shot with a mass of 4 kilograms at a speed of 9 meters/second. the shots kinetic energy is joules.

Explanation:

Step1: Identify values

$m = 4$ kg, $v=9$ m/s

Step2: Substitute into formula

$KE=\frac{1}{2}mv^{2}=\frac{1}{2}\times4\times9^{2}$

Step3: Calculate result

$\frac{1}{2}\times4\times9^{2}=2\times81 = 162$ J

Answer:

162