Q.

The force acting on a ball due to earth has a magnitude Fb and that acting on the earth due to the ball has a magnitude Fa, then


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a

Fb= Fa

b

Fb> Fa

c

Fb< Fa

d

Fa=0 

answer is A.

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Detailed Solution

The force acting on a ball due to earth has a magnitude Fb and that acting on the earth due to the ball has a magnitude Fa, then Fb= Fa.
According to Newton’s third law of motion, “Every action has an equal and opposite reaction”. The force exerted by the earth on the ball is equal to the force exerted by the ball on the earth but in the opposite direction as the two bodies are in contact with each other.
 
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The force acting on a ball due to earth has a magnitude Fb and that acting on the earth due to the ball has a magnitude Fa, then