Newton s Laws of Motion with Dr. Tony Crider
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1 Newton s Laws of Motion with Dr. Tony Crider
2 Student Learning Objectives
3 Student Learning Objectives First Law: An object in motion stays in motion, an object at rest stays at rest unless acted upon by an external force.
4 Student Learning Objectives First Law: An object in motion stays in motion, an object at rest stays at rest unless acted upon by an external force. Second Law: F = m a
5 Student Learning Objectives First Law: An object in motion stays in motion, an object at rest stays at rest unless acted upon by an external force. Second Law: F = m a Third Law: For every action there is an equal and opposite reaction.
6 Galileo and his Inclined Planes
7 Galileo and his Inclined Planes
8 Galileo and his Inclined Planes
9 Galileo and his Inclined Planes If I have a long horizontal plane, how far must the ball go to reach the same height?
10 Galileo and his Inclined Planes If I have a long horizontal plane, how far must the ball go to reach the same height?
11 A steel ball is attached to a string and is swung in a circular path in a horizontal plane. At point P, the string suddenly breaks near the ball
12 Student Learning Objectives
13 Student Learning Objectives First Law: An object in motion stays in motion, an object at rest stays at rest unless acted upon by an external force.
14 Student Learning Objectives First Law: An object in motion stays in motion, an object at rest stays at rest unless acted upon by an external force. Second Law: F = m a
15 Student Learning Objectives First Law: An object in motion stays in motion, an object at rest stays at rest unless acted upon by an external force. Second Law: F = m a Third Law: For every action there is an equal and opposite reaction.
16 What is force?
17 What is force? A force is a push or a pull.
18 What is force? A force causes a mass to accelerate.
19 What is acceleration? a = change in velocity elapsed time = Δv Δt
20 What is velocity? Velocity is a vector. It has both a magnitude and a direction. Speed is a scalar. It has only a magnitude. speed 65 mph
21 What is velocity? Velocity is a vector. It has both a magnitude and a direction. Speed is a scalar. It has only a magnitude. speed velocity 65 mph 65 mph East
22 Which one of the following describes an object that is accelerating? A car traveling on a... 1 straight, flat road at a steady 50 mph. 2 straight uphill road at a steady 30 mph. 3 circular track at a steady 100 mph.
23 Student Learning Objectives
24 Student Learning Objectives First Law: An object in motion stays in motion, an object at rest stays at rest unless acted upon by an external force.
25 Student Learning Objectives First Law: An object in motion stays in motion, an object at rest stays at rest unless acted upon by an external force. Second Law: F = m a
26 Student Learning Objectives First Law: An object in motion stays in motion, an object at rest stays at rest unless acted upon by an external force. Second Law: F = m a Third Law: For every action there is an equal and opposite reaction.
27 A B
28 A B mass A = mass B
29 A B mass A = mass B Force B on A = Force A on B
30 A B mass A = mass B Force B on A = Force A on B acceleration A = acceleration B
31 A B mass A = mass B Force B on A = Force A on B acceleration A = acceleration B
32 A B
33 A B mass A > mass B
34 A B mass A > mass B Force B on A = Force A on B
35 A B mass A > mass B Force B on A = Force A on B acceleration A < acceleration B
36
37 Free fall
38 Free fall a = -9.8 m/s 2
39 How do the astronauts feel weightless if their weights are not much different from our own?
40
41
42
43 p. 85d
44 How to Experience Weightlessness
45 How to Experience Weightlessness Fly on the Space Shuttle, which continually accelerates toward the Earth in its orbit.
46 How to Experience Weightlessness Fly on the Space Shuttle, which continually accelerates toward the Earth in its orbit. (days of weightlessness)
47 How to Experience Weightlessness Fly on the Space Shuttle, which continually accelerates toward the Earth in its orbit. (days of weightlessness) Get in an elevator and cut the cord.
48 How to Experience Weightlessness Fly on the Space Shuttle, which continually accelerates toward the Earth in its orbit. (days of weightlessness) Get in an elevator and cut the cord. (seconds of weightlessness, 1 time)
49 How to Experience Weightlessness Fly on the Space Shuttle, which continually accelerates toward the Earth in its orbit. (days of weightlessness) Get in an elevator and cut the cord. (seconds of weightlessness, 1 time) Ride on a plane that is free-falling.
50 How to Experience Weightlessness Fly on the Space Shuttle, which continually accelerates toward the Earth in its orbit. (days of weightlessness) Get in an elevator and cut the cord. (seconds of weightlessness, 1 time) Ride on a plane that is free-falling. (seconds of weightlessness, 20 times a day)
51
52 Student Learning Objectives
53 Student Learning Objectives First Law: An object in motion stays in motion, an object at rest stays at rest unless acted upon by an external force.
54 Student Learning Objectives First Law: An object in motion stays in motion, an object at rest stays at rest unless acted upon by an external force. Second Law: F = m a
55 Student Learning Objectives First Law: An object in motion stays in motion, an object at rest stays at rest unless acted upon by an external force. Second Law: F = m a Third Law: For every action there is an equal and opposite reaction.
56 Newton s Universal Law of Gravity with Dr. Tony Crider
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