The power of the chain motor on a roller coaster lift hill is 4 kW.It takes 50 seconds for the chain to take a train to the top of the lift hill.Calculate the work done when the train reaches the top of the lift hill.Work done = _____

The chain motor on a rollercoaster lift hill has a power of 5 kW. It takes 45 seconds for the chain to take a train to the top of the lift hill.Calculate the energy transferred to the rollercoaster train when it reaches the top of the lift hill.You must include units in your answer.

Stanley the horse is pulling a loaded cart. He generates a power of 15 kW while pulling the cart for 2 minutes. Calculate the work done by Stanley, in kilojoules.

An empty lift has a weight of 4.1 kN.It takes half a minute to travel 150 m.Calculate the power of the lift in kilowatts.Power = _____ kW

A 400 kg rollercoaster is on a 20 m hill and is not moving.  At the bottom of the hill, it has a velocity of 10 m/s. How much energy does the rollercoaster have at the bottom of the hill? a58400 J b78400 J c20000 J d98400 J

A 400 kg roller coaster is stopped on top of a 20 m hill.  It then races down the hill and at the bottom has a velocity of 15 m/s.  How much energy did the roller coaster lose when it traveled from the top to the bottom of the hill? a78400 J b24800 J c45000 J d33400 J