8. A car moving at 35 m/s has 675 joules of KE. What is the mass of the car?

Kinetic energy is the energy possessed by a body in motion while potential energy is the energy of a body at rest.

Kinetic energy is given by E=1/2MV² where M is the mass of the body while V is the velocity of the body.

To get mass we can use the formula M = 2 Ek/V² (Making M the subject)

hence mass = (2 * 675) : 35²

= 1.102 kg