A3730-kg suv can climb up a 600-m high hill in one minute (60 seconds). how much is its power output in horse-powers? 245 hp
490 hp
800 hp
373 hp
600 hp

490hp

Explanation:

Power is energy per unit of time, an in this case the energy needed is the gravitational potential energy, so we have:

Since all units are in S.I. we get our result in Watts (Joules/s). To convert to horse power (imperial), we need to know that:

Which obviously means:

So we can write:

There is also metric horse power (), and using this value we get , although both results are close.

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