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Motion Vocabulary1. motion
2. speed
3. velocity
4. acceleration
5. force
6. newton
7. net force
8. friction
9. gravity
10. weight
11. mass
12. terminal velocity
13. free fall
14. projectile motion
15. inertia
16. momentum
17. work
18. joule
19. power
20. watt
21. work input
22. work output
23. wave
24. transverse wave
25. longitudinal wave
26. amplitude
27. wavelength
28. reflection
29. refraction
Speed vs. Velocity
Speed - SI unit m/s
distance traveled divided by the time interval during which the motion occurred
Velocity – SI unit m/s plus direction
speed of an object in a particular direction
Acceleration – pg. 514
rate at which velocity changes over time; an object accelerates if its speed, direction, or both change.
a = v2 – v1/ t
Force – SI unit N – pg. 517
a push or a pull exerted on an object in order to change the motion of the object; force has size and direction
net force – combination of all the forces acting on an object
balanced force – when the forces on an object produce a net force of 0 N
copy question & answer in notebook
1. How is velocity different from speed?
2. How does the direction of the net force on a object compare to the direction of its motion?
3. How does a net force of 0 N impact an object’s motion?
weight vs. mass
weight
measure of the gravitational force exerted on an object
mass
a measure of the amount of matter in an object
Newton’s 1st law of motion
An object at rest remains at rest, and an object in motion remains in motion at a constant speed and in a straight line unless acted on by an unbalanced force.
Newton’s 2nd law
The acceleration of an object depends on the mass of the object and the amount of force applied.
F = m x a
a = F/m
Newton’s 3rd law
When one object exerts a force on a second object, the second object exerts an equal and opposite force on the first.
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