Ben Green

A trailer has a mass of 5000 kg. It is pulled by a truck with a force of 8750 N. If the frictional force is 2000 N, what is its acceleration? Would I need to subtract both forces then divide the answer by the mass?

A refrigeration unit on a job site must be slid into place. If the frictional force of 975 N opposes the motion and two workers apply a total force of 1095 N to the unit, what is the net force on the unit? DO I SUBTRACT THE FORCES?

How many kilocalories of heat are required to melt 20.0 kg of ice at 0°C? Okay so the given is m=20.0kg Ti=0°C HeatFusionIce=80 kcal/kg

so the setup would be (20.0)(80)=1600cal?

Thank you for clearing that up (1.50*2.26*10^6)= 3.39*10^6 J