Question

What is force? What are its absolute and gravitational units ? How are these related to each other?

Answer 1

Step 1: Definition of force

1. A force is a push or pulls on an object caused by its interaction with another object.
2. If two objects interact, a force is exerted on each of the objects.

Step 2: absolute and gravitational units

1. Newton $\left(\mathrm{N}\right)$is the absolute unit of force. $1\mathrm{N}=1\mathrm{kgm}/{\mathrm{s}}^2$
2. The gravitational unit is the kilogram-force ($kgf$). $1\mathrm{Kgf}$ is the amount of force exerted by gravity on a body of mass $1\mathrm{kg}$ .

Step 3: Relation between the absolute and gravitational unit of force:

We know that the value of $g$ is approximately $9.8\mathrm{m}/{\mathrm{s}}^2$
Hence, $1\mathrm{kgf}=9.8\mathrm{N}$