Question

A rock is thrown straight up. What is the net external force acting on the rock when it is at the top of its trajectory?​

Answer 1

Answer:

At the top of the trajectory, the net external force on the rock is the gravitational force on the rock from the Earth.

Explanation:

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Answer 2

Answer:

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A rock is thrown straight up. What is the net external force acting on the rock when it is at the top of its trajectory?

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At the top of the trajectory, the net external force on the rock is the gravitational force on the rock from the Earth.

Net external force acting on the rock when it is at the top of its trajectory is force due to gravity (mg).