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a car moving at a speed of 50 km/h has a kinetic energy of x,what kinetic energy will it have when moving at 100 km/h?

+7 votes
207 views
asked in OTHER by amir (360 points)

If a car moving at a speed of 50 km/h has a kinetic energy of x, what kinetic energy will it have when moving at 100 km/h?

1 Answer

+1 vote
answered by Andrew
selected by amir
 
Best answer
As it is the same car in the equation Ek = 1/2 m v^2
Then 1/2m is constant and can be removed.
Therefore doubling v and v being squared gives a solution of Ek=4x.

Hope that helps. 

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