Question

12,479 Learners found this answer helpful

what is the kinetic energy of a football traveling at a speed of 40 m/s with a mass of 0.40 kg? kinetic energy is the energy that objects possess due to their motion. ke = 1/2 mv² m = mass (kg) v = velocity (m/s) ke = kinetic energy (j) 320 j 640 j 8 j 16 j

Explanation:

Step1: Identify the formula

The formula for kinetic energy is $KE=\frac{1}{2}mv^{2}$, where $m = 0.40\ kg$ and $v = 40\ m/s$.

Step2: Substitute values

Substitute $m = 0.40$ and $v = 40$ into the formula: $KE=\frac{1}{2}\times0.40\times40^{2}$.

Step3: Calculate

First, calculate $40^{2}=1600$. Then, $\frac{1}{2}\times0.40\times1600 = 0.2\times1600=320\ J$.

Answer:

320 J