Describe a skydivers jump from the airplane to the ground

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd a) 30 joules b) 3000 joules c) 320 joules d) 3200 joules

Since the energy was not raising the temperature of the water during these segments, what was the energy used to do instead? your answer must include an explanation of what is happening to the molecules.