Home Physics Newton's Laws of Motion Friction and Frictional Force A 20 kg block is placed on top of 50 kg bloc…
Physics Newton's Laws of Motion Friction and Frictional Force MCQ (Single Correct)

A 20 kg block is placed on top of 50 kg block as shown in fig. A horizontal force F acting on A causes an acceleration of 3m/s 2 to A and 2 m/s 2 to B as shown in fig. For this situation mark out the correct statement (s)

A
The friction force between A and B is 40 N
B
The net force acting on A is 150 N
C
The value of F is 190 N
D
The value of F is 150 N

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The correct answer is:
CHECK THE SOLUTION.

(a, b, c)

f = m A a = 40 N

F – f = m B a = 50 × 3 N = 150 N

F = 150 N + 40 N = 190 N

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