Question

A 10 gram ball is rolling at 3 m/s. Calculate its kinetic energy.

Answer 1

ANSWER:

0.045 joules

STEP-BY-STEP EXPLANATION:

Given:

mass (m) = 10 g = 0.01 kg

velocity (v) = 3 m/s

The kinetic energy is given by the following formula:

$K_E=\frac{1}{2}mv^2$

We replacing:

$\begin{gathered} K_E=\frac{1}{2}\cdot0.01\cdot3^2 \\ K_E=0.045\text{ J} \end{gathered}$

The kinetic energy is 0.045 joules.