1.

When does a body have zero force of friction?

A.  When no force is applied on a body at rest
B.  When a large force is applied on a body
C.  Force exerted by the first body on the second is not equal to the force exerted by the second body on the first.
D.  When a body is sliding on the surface
Answer» B.  When a large force is applied on a body


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