Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects...

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Newton’s Laws of Motion

Transcript of Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects...

Page 1: Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a.

Newton’s Laws of Motion

Page 2: Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a.

The First Law of Motion

Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a constant velocity.

Page 3: Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a.

WHAT???

• Objects at rest stay at rest.

• Objects in motion stay in motion.

WHY???

• A force must act on them to make them start or stop.

Page 4: Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a.

What forces change an objects motion?

• Friction

• Gravity

• A push or a pull

Page 5: Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a.

Inertia – the tendency for an object to stay at rest or in motion.

Page 6: Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a.

The Second Law of Motion

Acceleration (change in speed or direction) of an object depends on the object’s mass and on the net force acting on it.

10 N

Page 7: Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a.

Calculating Force

F= m x a

a = F ÷ m

Page 8: Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a.

What is the net force on a 1,000-kg object accelerating at 3 m/s2?

Page 9: Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a.

What net force is needed to accelerate a 25-kg cart at 14 m/s2?

Page 10: Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a.

Acceleration

Increase Force

OR

Decrease Mass

Page 11: Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a.

Acceleration

Decrease Force

OR

Increase Mass

Page 12: Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a.

The Third Law of Motion

For every action there is an equal and opposite reaction

15 N 15 N

Page 13: Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a.

momentum – the product of an object’s mass and velocity

momentum = mass x velocity

Page 14: Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a.

What is the momentum of a bird with a mass of 0.018kg flying at 15m/s?

Page 15: Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a.

A golf ball travels at 16m/s, while a baseball moves at 7m/s. The mass of the golf ball is 0.045kg and the mass of the baseball is 0.14kg. Which has the greater momentum?

Page 16: Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a.

Law of Conservation of Momentum – in the absence of outside forces, the total momentum of objects that interact does not change.

Page 17: Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a.
Page 18: Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a.
Page 19: Newton’s Laws of Motion. The First Law of Motion Objects at rest will stay at rest and objects moving at a constant velocity will continue moving at a.

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Chapter 8 Momentum. The concept of inertia was introduced and developed both in terms of objects at rest and objects in motion. In this chapter we are.

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Development of Modern Astronomy - GMU College of Sciencephysics.gmu.edu/~hgeller/TeacherWorkshop/ch04a.pdfmotions of objects on Earth as well as in space • a body remains at rest,

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UNIT 3€¦ · UNIT 3 NEWTON’S LAWS. NEWTON’S LAWS 1st NOTES 2nd 3rd Objects in motion stay in motion and objects at rest stay at rest unless acted upon by an unbalanced force.

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LESSON 2 ˜ e Physics of ight Y · referred to such forces in his fi rst law (Figure 2.1): “Objects at rest remain at rest and objects in motion remain in motion in a straight

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Civil Engineering Science Concepts. Forces Static forces act on objects at rest. Compression forces shorten objects. These forces push structures. Tension.

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Physics C-5. Objects at rest tend to stay at rest. Objects in motion tend to stay in motion. Also called the Law of Inertia.

Physics C-5. Objects at rest tend to stay at rest. Objects in motion tend to stay in motion. Also called the Law of Inertia.

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An object at rest will stay at rest, unless an outside force is placed on it. Commonly known as Inertia An object at rest will stay at rest, unless.

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