A rock is falling towards the Earth. Suppose the action force is the pull of the Earth on the rock. What is the reaction force?
I do not know how to find the reaction force.
I think it would be air resistance :)
The reaction force is the rock pulling up on earth, I am not sure though.
The reaction force in this scenario is the equal and opposite force exerted by the rock on the Earth. According to Newton's third law of motion, for every action, there is an equal and opposite reaction. In this case, as the Earth pulls on the rock, the rock simultaneously pulls on the Earth with an equal magnitude but in the opposite direction.
To determine the reaction force, you can apply Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. In this scenario, the action force is the pull of the Earth on the rock. Therefore, the reaction force will be the force exerted by the rock on the Earth.
To find the magnitude of the reaction force, you need to consider that the force between two objects is directly proportional to their masses and inversely proportional to the square of the distance between their centers. However, because the mass of the Earth is significantly larger than the rock and the distance between their centers is relatively small compared to the Earth's radius, we can assume that the Earth remains essentially stationary.
Hence, the reaction force will have the same magnitude as the action force, but in the opposite direction. This reaction force will cause the Earth to exert an equal and opposite gravitational force on the falling rock, ultimately causing it to accelerate towards the Earth.