Question

ten one rupee coins are put on top of each other on a table.each coin has a mass m. which of the following statement is not true?
a)the force on the 6th coin (counted from the bottom) due to all coins on its top is equal to 4mg( downward)
b) the force on the 6th coin due to the 7th coin is 4mg (downward)
c) the reaction of the 6th coin due to the 7th coin is 4mg ( upward)
d) the total force on the 10th coin is 9mg(downward)
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Answer 1

the answer should be (B)

Answer 2

Answer:reaction on sixth is in upward direction. Therefore b option is wrong

Explanation: