Two Blocks,B1 and B2 with Masses of 12

question 31

Multiple Choice

Two blocks,B1 and B2 with masses of 12.0 kg and 5.60 kg,respectively,are in contact with each other on a frictionless horizontal surface.A purely horizontal force of 30.0 N is applied to B1,which in turn pushes B2 and both blocks accelerate together uniformly.The net horizontal force acting on B2 is

• A)9.55 N.
• B)15.0 N.
• C)20.5 N.
• D)30.0 N.
• E)60.0 N.

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