Question

calculate the kinetic energy of a 3kg ball with velocity of 4m/s
96 j
48 j
12 j
24 j

Explanation:

Step1: Recall the formula for kinetic energy

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

Step2: Substitute the given values into the formula

Given \(m = 3\space kg\) and \(v=4\space m/s\). Then \(KE=\frac{1}{2}\times3\times(4)^{2}\).
First, calculate \((4)^{2}=16\). Then \(\frac{1}{2}\times3\times16=\frac{3\times16}{2}\).
Since \(3\times16 = 48\), and \(\frac{48}{2}=24\).

Answer:

24 J