Energy Problems

A football player throws a ball with a mass of 0.34 kg. What is the gravitational potential energy of the ball when it is 5.0 m above the ground?

17 J

A 2.0-kg book is on a shelf that is 1.6 m high. What is the gravitational potential energy of the book relative to the ground?

32 J

Roger Federer's tennis ball has a mass of 0.3 kg. If he holds the ball above the ground at a height of 2.0 m to serve, what is its gravitational potential energy (GPE)?

GPE = 6.0 J

What is the Kinetic Energy of a 150 kg object that is moving with a speed of 15 m/s?

KE = 16875J

What is the Kinetic Energy of a 1200 kg object that is moving with a speed of 24 m/s?

KE = 345,600J

An object moving with a speed of 35 m/s and has a kinetic energy of 1500 J, what is the mass of the object?

m = 2.45kg

An object has a kinetic energy of 25 J and a mass of 34 kg , how fast is the object moving?

v = 1.28m/s