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Q.

A sphere of mass $m_{1}$ is placed on a plank of mass $m_{2}$ . The coeffcient of friction between the plank and sphere is $μ$ . If the inclined plane is smooth, the frictional force between the plank and sphere:

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a

$0$

b

= $μ m_{1} g \cos 0$

c

depends on $m_{2}$

d

depends on $m_{1}$

answer is C.

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Detailed Solution

$m_{1} g \sin 0 = F_{p s e u d o}$ ………(1)

$m_{1} g \sin 0 - f = m_{1} g \sin 0 \Rightarrow f = 0$

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