What is the height of a shelf that has 15 kg objects with 450 J of gravitational potential energy

they are playing too much beyblade in the office

explanation:

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.