A body of mass 400 g slides on a rough horizontal surface. If the fric – McqOptions

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1.	A body of mass 400 g slides on a rough horizontal surface. If the frictional force is 3.0 N, find the magnitude of the contact force.
A.	5 N
B.	10 N
C.	15 N
D.	20 N
Answer» B. 10 N

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