Forces + Newton's Laws

7. A force that is exerted by a surface perpendicular to the object contacting it.
9. When a yolkswagon hits a wall with a 400N force, the wall _____________________ with a 400 N force.
10. If the mass of an object increases, the FORCE needed to stop it with a certain deceleration ___________________.
11. When forces are balanced on an object it will not ________________________.
12. According to Newton's First Law, an object will resist any change in its MOTION until it is acted upon by an __________________ force.
13. Any push or pull.
17. Force exerted in direction of motion supplied by work from an engine.
18. A plane has 50,000N of thrust force pushing forward, and 50,000N of friction/drag force pulling it backward. It is moving 600km/h. Its motion will ____________________.
19. Tendency to resist any change in motion.
20. How much force is needed to accelerate a 10kg mass at 4 m/s2?
21. The overall force acting on an object after all the forces are combined.

1. In order for an object to change how it is moving, the forces acting on it have to become _____________________.
2. When forces are balanced on an object it will __________________ its motion.
3. If the mass of an object ____________________, the FORCE needed to MOVE it at a specific acceleration decreases.
4. The force that pulls objects toward Earth.
5. For every ________________ there is an equal and opposite reaction.
6. When a FORCE is applied by an object to another surface/object, that surface/object applies an ______________________ force towards the original object.
8. A 20,000N thrust force is applied forward on a car, a 1,000N friction/drag force is pulling backward. Will the motion of the car change?
14. If the mass of an object decreases, the FORCE needed to STOP it at a specific deceleration _________________.
15. Force that one surface exerts on another when they are rubbed together, acting in the opposite direction of motion.
16. A force that does not have an equal force acting from the opposite direction.