While at a construction site, you see a crane lift a 1000kg steel beam up to a height of 10m in a time period of 5.0 seconds. a few minutes later, you see a 1000kg car go from rest to 10m/s in a time period of 2.0 seconds? calculate the power output of the car engine and the crane motor. which has a higher power output?

Car has more power output than crane      

Explanation:

We have given that mass of the crane m = 1000 kg

Height through which crane lift the steel beam h = 10 m

Acceleration due to gravity

So work done by crane

Time period is given as t = 5 sec

We know that power

Now mass of the car = 1000 kg

Initial velocity u = 0 m /sec

Final velocity v = 10 m/sec

We know that work done is equal to the change in kinetic energy

So work done

Time ids given as t = 2 sec

So power

So car has more power output than crane

this would be about 43%