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Question

In the given figure the co-efficient of friction between 2 kg and 3 kg blocks is 0.2 and between 3 kg and ground is 0.1. Choose the correct statements:

A
Minimum value of F for which 3 kg can move is 10 N.
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B
When force is 4N, static friction at all the surfaces is 4 N.
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C
Maximum acceleration of 2 kg is 1 m/s2.
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D
Slipping between 2 kg and 3 kg blocks starts when F > 15 N.
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Solution

The correct option is D Slipping between 2 kg and 3 kg blocks starts when F > 15 N.

Fmin=5N
Maximum acceleration of 2kg=42=2m/s2
Maximum force at which they will move together is
F-5=5(2)
F=15N

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