will someone help check my answer?

A 1,500 kg car coasts down a hill starting from rest and decreases its height by 22 m over a distance of 100 m of travel. How fast will it be going at the end of the hill, if friction has no effect in slowing its motion?

21 m/s *my answer*

15 m/s

44 m/s

800 m/s

Question

will someone help check my answer?

A 1,500 kg car coasts down a hill starting from rest and decreases its height by 22 m over a distance of 100 m of travel. How fast will it be going at the end of the hill, if friction has no effect in slowing its motion?

       21 m/s *my answer*

       15 m/s

       44 m/s

       800 m/s

anonymous · Answer

@nincompoop can you help?

anonymous · Answer

@TheSmartOne can you help me check my answer? a simple yes or no would be fine :)

anonymous · Answer

Is this a physics question? O.o 

Anyway, can you show us how you get your answer? 
Law of conservation of energy. 
Initial mechanical energy is equal to Final mechanical energy.
Mechanical energy is the sum of Kinetic and potential energy.
So at the beginning, the car has a KE but PE =0 
At the end, the car has PE but zero KE.
Then apply the law.

From this concept, I assume that you get it right but it is better to make sure, so maybe show us your method? (: