a 4 kg block A is placed at the top of 8 kg block B which rests on a smooth surface.A just slips on B when a force of 20N is applied on A. The maximum horizontal force F required to make both A and B move together
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Answer:
180 newton is right answer
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F= 60N
Explanation:
If the both blocks A and B move together then the acceleration will be same. If f is the force of friction between A and B .
Then,
and
So
so
F= 20+40=60N
F= 60N
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