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Ten one-rupee coins are put on top of ea...

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
(a) the force on the `7^(th)` coin (counted from the bottom due to all the coins on its top .
(b) the force on the `7^(th)` coin by the eigth coin.
(c ) the reaction of the `6^(th)` coin one th `7^(th)` coin .

A

`0.3 N` downwards

B

`0.3 N` upwards

C

`0.7 N` downwards

D

`0.7 N` upwards

Text Solution

Verified by Experts

The correct Answer is:
A
Force on the seventh coin = weight of the three coins above it. `F=3mg`
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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 (a) the force on the 7^(th) coin (counted from the bottom due to all the coins on its top. (b) the force on the 7^(th) coin by the eight coin. (c) the reaction of the 6^(th) coin one the 7^(th) coin.

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Knowledge Check

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

    A
    4gm
    B
    6gm
    C
    7gm
    D
    3gm

  • Ten one-rupee coins are put on top of each other on a table, Each coin has a mass m. Which of the following statements in not ture?

    A
    The force on the `6^(th)` coin due to `7^(th)` coin is 4mg (downwards)
    B
    The force on the `6^(th)` coin to `7^(th)` coin is 4mg (downwards)
    C
    The reaction of the 6th coin on the `7^(th)` coin is 4mg (upward)
    D
    The total force on the `10^(th)` coin is `9mg` (downwards)

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    A
    0.3 N downwards
    B
    0.3 N upwards
    C
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    D
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