Concepts

Concepts

1. force:strength used upon an object; physical coercion; violence:

2. mass:a body of matter, usually of indefinite shape:

3. push: to press against with force in order to move:

4. pull: to strain

5. gravitational: the force of attraction between any two masses.

6. inertial:the property of matter by which it keeps its state so long as it is not acted upon by an external force