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A block (A) of mass 3 kg in contact with...

A block (A) of mass 3 kg in contact with a second block (B) of mass 2 kg rests on a frictionless horizontal surface. A horizontal force of 20 N is applied to push the block A. What is the force with which the block A pushes the block B?

A

4N

B

6N

C

8N

D

10N

Text Solution

Verified by Experts

The correct Answer is:
C
The force of 20N produces an acceleration (a) in the two blocks and
`a=(F)/(m_(1)+m_(2))= (20)/(3+2)= 4m//s^(2)`
`therefore` The force with which the block A pushes the block B is
`f_(1)= m_(2)xx a= 2xx4= 8N`
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