Newtons laws

Newton's Laws

of Motion

How do they apply to my life?

Newton's Laws of Motion

By the end of this lesson, you should be able to:

• Identify Newton's 3 Laws of Motion.

• Identify which law of motion applies in a given scenario.

• Provide examples of each of Newton's Laws of Motion.

Newton's 1st Law of Motion

Law of Inertia

Newton's 1st Law

of Motion

(Law of Inertia)

An object will resist a change in motion until acted upon by an unbalanced force.

** Forces can be seen or unseen.

*** What are some examples??

Newtons 1st Law example

• A golf ball will stay on the tee unless an unbalanced force acts upon it.

• What are some forces that might cause it to move?

Multiple Choice

Newton's 1st Law of Motion is also known as the Law of

• Forces.

• Inertia.

• Accelertion.

Multiple Choice

According to Newton's 1st Law, an object that is at rest will ______________ until it is acted upon by an unbalanced force.

• remain at rest

• start moving forward

• start moving backward

Multiple Choice

The tendency of an object to resist a change in motion is called ___.

• Force

• Momentum

• Inertia

Open Ended

How does this diagram illustrate Newton's 1st Law of Motion?

**Turn & Talk for a minute and then type your answer.

Newton's 2nd Law of Motion

Force = Mass x Acceleration

Newtons 2nd Laws

• Force = mass x acceleration

• The amount of force needed to accelerate an object is proportional to the mass of the object.

Example of 2nd Law

Less force is required to push the smaller (less massive) ball.

Another example of 2nd Law

If two objects of the same mass are pushed with different forces, the greater force will produce the greatest acceleration.

Open Ended

Describe how this picture illustrates Newton's 2nd Law of Motion. (Notice the force, mass, and acceleration labeled in the diagram.)

**Let's T and T first!

Multiple Choice

According to Newton's 2nd Law of motion, if an equal force is applied to 2 objects with different masses, which object will experience greater acceleration?

• both will accelerate equally

• the object with more mass

• the object with less mass

• neither one

Newton's 3rd Law of Motion

(Law of Action-Reaction)

Newton's 3rd Law

of Motion

For every action (force) there is an equal an opposite reaction (opposite force)

Examples of Newton's 3rd Law

• When you push your hand against a wall, the force of the wall pushing back is equal to the force exerted by your hand.

• When walking, the force with which you push back with your foot propels your body forward with equal force.

Newton's 3rd Law example

When the swimmer pushes the water back with force, her body pushes forward with the same force. (equal and opposite forces)

Multiple Choice

Which example below BEST illustrates Newton's 3rd Law of Motion?

Multiple Choice

Newton's 1st Law of Motion is also known as the Law of

• Inertia

• Reacton

• Forces

Multiple Choice

It takes more force to accelerate a large truck than it does to accelerate a small bicycle. Which law does this illustrate?

• Newton's 1st Law

  (Law of Inertia)

• Newton's 2nd Law

  (F = m x a)

• Newton's 3rd Law

  (Law of Action-Reaction)

Multiple Choice

When a driver hits on his brakes the car stops, but the books that are on the front seat fly forward and hit the dashboard. Which Law of Motion does this illustrate?

• Newton's 1st Law

  (Law of Inertia)

• Newton's 2nd Law

  (F= m x a)

• Newton's 3rd Law

  (Law of Action-Reaction)

Multiple Choice

When you jump, your legs apply a force to the ground, and the ground applies and equal and opposite reaction force that propels you into the air.

• Newton's 1st Law

  (Law of Inertia)

• Newton's 2nd Law

  (F = m x a)

• Newton's 3rd Law

  (Law of Action-Reaction)

Poll

Choose the statement that best describes your level of understanding of Newton's Laws of Motion.

• I'm confused.

• I have a pretty good understanding.

• I totally got it.