Question

find the magnitude and direction of the reaction force acting on a coin of 10g lying on the surface of the floor.g=10m/s​

Answer 1

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Explanation:

FORCE =MASS OF THE BODY ×

ACCELERATION OF THE BODY

The force =10×10(unit)

Answer 2

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2

tanishka1996

02.11.2019

Physics

Secondary School

answered

what will be the magnitude and direction of the reaction force acting on a coin of20g lying on the surface of the floor? Take g=9.8 m/s²

2

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magnitude of reaction force is 0.196 N and direction is just upward (push the coin) as shown in figure.

A coin lying on the surface of the floor. mass of coin is 20g. due to gravitation force of attraction, body have tendency to move towards the centre of the earth.

so, weight of coin , w = 20g × 9.8m/s² = 196 × 10^-3 = 0.196 N exerts on the surface of the floor.

now from Newton's 3rd law, “action and reaction are of equal in magnitude and directed in opposite directions.”

from this law, force of equal magnitude must be exerted on the coin.

so, normal reaction force applied on the coin = w = 0.196 N

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