The truck has kinetic energy when moving up the ramp and has potential energy when it stops. The height will be when potential energy becomes kinetic energy
Kinetic energy = 1/2 mv² = 1/2 x 3 x 2² = 6 Joules
Potential Energy = mgh = Kinetic energy when truck comes to a stop m - mass of truck g - accelerations due to gravity = 9.8 m/s² h - height of truck from ground mgh = 6 Joules h = 6/mg = 6/(3 x 9.8) = 6/29.4 = 0.204 m The truck rolls 0.204 m or 20.4 cm high up the ramp before it stops
