Ten ,one rupees coin are put on the top of at each other on a table each coin has a mass 'm' give the magnitudes and direction of - 1. The force of seventh coin (counted from bottom) due to all the coins. 2. The reaction of 6th coin on the 7th coin. 3. The force at 7th coin by 8th coin.

2 answers

would it be n*mg where n is the coins above it?
Force on 7th coin is 3mg
force on 7th due to 8th is also 3mg