Question

Calculate the kinetic energy of a 0.5 kg soccer ball that is falling at a velocity of 3m/s.

Calculate the potential energy of the same soccer ball if the height of the ball is 12m use 10m/s^2 as the acceleration due to gravity

PE = mgh
KE=1/2 m v^2



A. KE =4.5J
PE = 6J

B. KE= 0.75J
PE= 18 J

C. KE= 225J
PE= 600J

D. KE= 2.25J
PE= 60J

Answer 1

the expression for the kinetic energy is mass times velocity squared over two For the first question that gives us 2,25 joules If the ball is at the given height then it has a further 60 Joules in potential energy. Answer is D

Answer 2

I don't what is the value for PE but KE=2.25J so for me the correct answer is D