Physics chapter 1-7

4. The change in momentum of an object when a force is applied over time.
9. The rate of change of velocity.
11. The SI unit of force.
14. The measure of an object's mass multiplied by the gravitational field strength.
15. The ability to do work or cause change.
17. A vector quantity that measures the change in position of an object.
18. Tendency of a body to resist changes in its velocity.
19. The product of force and distance moved in the direction of the force.
20. A force that resists motion between two surfaces.

1. The ratio of useful energy output to total energy input, usually expressed as a percentage.
2. Rate at which work is done or energy is transferred.
3. A scalar quantity that represents the total path length an object travels.
5. Energy stored in a body due to its position or state.
6. The force that pulls objects toward the center of the Earth.
7. The quantity of motion of a moving body, measured as a product of its mass and velocity.
8. Energy possessed by an object due to its motion.
10. The state when the net force on an object is zero.
12. The motion of an object under the influence of gravitational force only.
13. A push or pull that acts on an object.
16. Distance traveled per unit time in a specified direction.