Which of the following groups of forces could be in equibrium
Which of the following groups of forces could be in equibrium
- A
$3\, N, 4\, N, 5 \,N$
- B
$4\,N, 5 \,N, 10 \,N$
- C
$30\,N, 40 \,N, 80 \,N$
- D
$1\,N, 3\, N, 5\, N$
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- [AIIMS 2018]
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Ten one-rupee coins are put on top of each other on a table. Each coin has a mass $m$ Give the magnitude and direction of
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$(a)$ the force on the $7^{\text {th }}$ coin (counted from the bottom) due to all the coins on its top.
$(b)$ the force on the $7^{\text {th }}$ coin by the elghth coin,
$(c)$ the reaction of the $6^{\text {th }}$ coin on the $7^{\text {th }}$ coin.