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K.E. in Relativistic Physics

There is no s...

Question

There is no slipping between the two blocks. What is force of friction between two blocks?

A

Zero

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B

9N

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C

12N

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D

6N

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Solution

The correct option is D 6N
$a = \frac{18}{6} = 3 m / s^{2}$
2 kg block moves due to frictional force. Hence
$f = m a = 2 \times 3 = 6 N$

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