Mass times acceleration due to gravity is force, specifically weight.

Here's why:

* Mass: A measure of the amount of matter in an object.

* Acceleration due to gravity (g): The acceleration experienced by an object due to the gravitational pull of the Earth. It's approximately 9.8 m/s² near the Earth's surface.

* Force: A push or pull that can cause a change in motion.

The formula:

Force (weight) = Mass x Acceleration due to gravity

Example:

Imagine a person with a mass of 70 kg. Their weight would be:

Weight = 70 kg x 9.8 m/s² = 686 Newtons (N)