Question

calculate the number of joules of kinetic energy a 1 - kg book has when tossed across the room at a speed of 2 m/s.

Explanation:

Step1: Identify the formula for kinetic energy

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

Step2: Substitute the given values into the formula

Given \( m = 1\space kg \) and \( v=2\space m/s \).
Substitute into \( KE=\frac{1}{2}\times1\times(2)^{2} \).
First calculate \( (2)^{2}=4 \).
Then \( \frac{1}{2}\times1\times4 = 2 \).

Answer:

2 joules