Question

What was the Kinetic Energy of a 2-kg plate that falls from 15-meters and right before it hits the ground? a. 225 Joules b. 15 Joules c. 300 Joules d. Not enough information given

Answer 1

So we want to know what is the kinetic energy of a plate with mass m=2 kg that falls from height h=15 m. So initially the plate has potential energy Ep=m*g*h=294.3 J. That potential energy converts completely into kinetic energy right before the plate hits the ground. Our answer is close enough to 300 J so the correct answer is c. 300 Joules