First slide

Different types of Forces

Question

Ten coins each of mass 10 gm are placed one above the other. The reaction force exerted by 7^th coin from the bottom on the 8^th coin is (g = 10 m/s²)

Moderate

A

0.3N
B

0.2N
C

0.4N
D

0.7N

Solution

F = 3mg ⇒ 3 x 10 x 10^-3 x 10 = 0.3N

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