Beth walked to a cliff and dropped a stone. Neglecting any effects due to the ai

Question

Beth walked to a cliff and dropped a stone. Neglecting any effects due to the air as it falls vertically, which one of the following is the reaction force to the Earth’s gravity on the stone?

a. No reaction force appears in this situation since the stone is not exerting any forces on anything else

b. the gravitational force of the stone on the Earth

c. the normal force of the ground below

d. None of the answers is correct

e. the normal force of Beth’s hand on the stone

f. The information given is not adequate enough to identify the reaction force

Explanation / Answer

Here Earth gravitational force is acting on the stone

so stone will also apply same force on earth

and this force will be its reaction force

hence option b is correct

(b) The gravitational force of the stone on the Earth

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