A wooden trolley of mass 20 kg accelerates at 2 m s-2, if force due to engine is 50 N, friction force is equal to

A wooden trolley of mass 20 kg accelerates at 2 m s-2, i

1.	A wooden trolley of mass 20 kg accelerates at 2 m s-2, if force due to engine is 50 N, friction force is equal to
A.	1 N
B.	10N
C.	-10 N
D.	None of the above
Answer» C. -10 N

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&nbsp;A&nbsp;wooden&nbsp;trolley&nbsp;of&nbsp;mass&nbsp;20&nbsp;kg&nbsp;accelerates&nbsp;at&nbsp;2&nbsp;m&nbsp;s-2,&nbsp;if&nbsp;force&nbsp;due&nbsp;to&nbsp;engine&nbsp;is&nbsp;50&nbsp;N,&nbsp;friction&nbsp;force&nbsp;is&nbsp;equal&nbsp;to

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A wooden trolley of mass 20 kg accelerates at 2 m s-2, if force due to engine is 50 N, friction force is equal to