Question

what is the kinetic energy of a ball with a mass of 0.5 kg and a velocity of 10 m/s? (formula: $ke = \frac{1}{2}mv^{2}$)
25 j
5 j
50 j
100 j

Explanation:

Step1: Substitute the values into the formula

Given \(m = 0.5\space kg\) and \(v=10\space m/s\), substitute into \(KE=\frac{1}{2}mv^{2}\).
\(KE=\frac{1}{2}\times0.5\times(10)^{2}\)

Step2: Calculate the value

First, calculate \((10)^{2}=100\). Then \(\frac{1}{2}\times0.5\times100=(0.5\times0.5)\times100 = 0.25\times100\)

Answer:

A. \(25\space J\)