forces

2. a tendency to do nothing or to remain unchanged,
5. the speed of something in a given direction,
7. a coherent, typically large body of matter with no definite shape.
8. result in a change in motion,
10. if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force,
11. the resistance that one surface or object encounters when moving over another,
12. f=m x a,
13. a vehicle's capacity to gain speed within a short time,

1. first introduced as a unit of mass for the metric system,
3. if a body is not accelerated, there is no net force acting on it. Newton's third law states that when two bodies interact,
4. the rate at which someone or something is able to move or operate,
6. Balanced forces are equal in size and opposite in direction,
9. strength or energy as an attribute of physical action or movement,
10. It is equal to the force that would give a mass of one kilogram an acceleration of one meter per second per second,