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What exactly pushes a fallen object?

Physics Asked by Ashutosh Kumar on December 29, 2020

If an object falls and hit the ground with a force, the ground also pushes it back because of third law of motion but from where does the force coming in the ground particles and they are also pushed downwards at the same time due to force of object. So what actually applies force to the fallen object?

2 Answers

Your object consists of atoms composed of charges (electrons and protons). Likewise, the ground is as well. As the object hits the ground, the atoms in the ground are displaced and pushed closer together. The electrons in the atoms begin to repel each other and therefore resist this compression and as a consequence your object is then pushed by the atoms in the opposite direction.

Correct answer by Ali on December 29, 2020

We know of four different types of forces: strong nuclear forces, electromagnetic forces, weak nuclear forces, and gravitational forces. I believe the force from the ground on the object is electrical repulsion from the electrons in the atoms of the ground and the object being pushed closer together during the collision. A theoretical physicist can probably elaborate.

Answered by John Darby on December 29, 2020

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