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Questions  

Ten one-rupee coins are put on top of each other on a table. Each coin has a mass m. The reaction of the 6th coin (counted from the bottom) on the 7th coin is

a
4 mg
b
6 mg
c
7 mg
d
3 mg

detailed solution

Correct option is A

The sixth coin is under the weight of four coins above it. Hence,Reaction of the 6th coin on the 7th coin = Force on the 6th coin due to 7th coin = 4 mg

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