word problem

Question

 what is the mass of an object that creates 33750 joules of energy by traveling 35 m/s

Answer 1

K.E. = 1/2 mv²

 

The velocity is 35 m/s, so you have the following equation:

 

33750 = 1/2 m (35²)

33750 = 1/2 m *1225

33750 = 612.5 m

55.102 = m

 

So the mass is 55.102 kg.