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Q.

Two blocks of masses ‘3m’ and ‘2m’ are in contact on a smooth table. A force P is first applied horizontally on block of mass ‘3m’ and then on mass ‘2m’. The contact forces between the two blocks in the two cases are
in the ratio

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a

3:2

b

1:2

c

5:3

d

2:3

answer is B.

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Detailed Solution

As the blocks move together,

Contact force F=ma.

$\frac{F_{c_{1}}}{F_{c_{2}}} = \frac{m_{2}}{m_{1}} = \frac{2}{3}$

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Two blocks of masses ‘3m’ and ‘2m’ are in contact on a smooth table. A force P is first applied horizontally on block of mass ‘3m’ and then on mass ‘2m’. The contact forces between the two blocks in the two cases arein the ratio