If 10 J of energy was used to roll a ball on a flat horizontal surface, why does it eventually stop since we all abide by the law of conservation of energy?
A.gravity

B.friction

C.in this situation it will never stop rolling

D.fluid

Question

If 10 J of energy was used to roll a ball on a flat horizontal surface, why does it eventually stop since we all abide by the law of conservation of energy?  		
A.gravity
		
B.friction
		
C.in this situation it will never stop rolling
		
D.fluid

anonymous · Answer

B iam damn sure

anonymous · Answer

friction opposes the relative motion..none can beat it

anonymous · Answer

ever heard of motion perpetual machines....ill tell u an example...we all want free energy...ever imagind like this...a DC MOTOR connected to a generator to generate the current for the DC MOTOR itself...try it..ill bet you a million .you wont succed bcas of friction..but in a hypothetical condition it will...

dls · Answer

@Vaidehi09  he said because of friction :P not gravity!

anonymous · Answer

@DLS yea...just realized! its coz of friction!! my bad!

anonymous · Answer

B. Friction. Gravity would enter in the equation if the ball is rolling on non-horizontal surface.