A ping pong ball has a mass of about 2.45 grams. Suppose that Forrest Gump hits the ball across the table with a speed of about 4.00 m/s. What is the ball's KE?

0.0196 Joules

Explanation:

Kinetic energy is half the product of mass and velocity squared.

K. E=0.5 m*v^2; The m is the mass in kilograms and v is the velocity in meters per second.

We will convert grams to kilograms:

2.45 grams = 0.00245 kilograms.

Calculating kinetic energy:

mass:0.00245 kg

velocity:4 m/s

K. E = 0.5 * 0.00245*4^2 = 0.0196 Joules.