Force Identification
Classical Mechanics
Level
4
A boy is holding a ball in his hand (as shown in the figure). The reaction force to the force of gravity on ball is, the force exerted by the
Ball on the earth.
Earth on the ball
Hand on the ball
Ball on the hand
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1 solution
Gravity results from the force of the earth on the ball. By Newton's third law, the reaction force takes place between the same players: it is exerted by the ball, upon the earth.