Question

1. what is the kinetic energy of a 0.50 kg ball that is travelling at a speed of 40 m/s?

Explanation:

Step1: Recall the kinetic energy formula

The formula for kinetic energy is \(K.E.=\frac{1}{2}mv^{2}\), where \(m\) is the mass and \(v\) is the velocity.

Step2: Substitute the given values

Given \(m = 0.50\space kg\) and \(v=40\space m/s\). Substitute into the formula: \(K.E.=\frac{1}{2}\times0.50\times(40)^{2}\)

Step3: Calculate the value

First, calculate \((40)^{2}=1600\). Then \(\frac{1}{2}\times0.50\times1600 = 0.25\times1600\)

Answer:

\(400\space J\)