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Q.

Two block of masses 3 kg and 1 kg are kept in contact with each other on a frictionless horizontal surface. If a force of 10 N is applied on the larger block what is the acceleration of the system? What is the contact force between the two blocks?

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a

2.5m/s2 ; 5N

b

5m/s2 ; 2.5N

c

2.5m/s2 ; 2.5N

d

5m/s2 ; 5N

answer is A.

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Detailed Solution

As the bodies will move with common acceleration.

a=Fm1+m2=101+3=2.5ms-2.

Contact force= m1a=1x2.5=2.5N.

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