Newtons 3 laws

Newton's Laws

of Motion

SWBAT: Define the 3 Newtonian laws and provide an example of each.

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??

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

According to the first law (Inertia), when a person is driving a suddenly stops. The body was at movement, and then will want to...

• Remain moving, which is why the body jerks forward.

• Will want to stop just like the car

• The body has nothing to do with the car that stops movement.

• The force of the car exerts the same amount of force as the body does.

Newton's 2nd Law of Motion

Force = Mass x Acceleration

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.

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

Multiple Choice

Kevin is playing basketball. He throws the basketball to the hoop with an acceleration of 300m/s^2, the mass of the ball is 10kg. What is the force of the ball thrown?

• 3000N

• 30N

• 0.03N

• .3N

Newton's 3rd Law of Motion

(Law of Action-Reaction)

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

Every action has a

• a equal and opposite reaction.

• Has equal and same reaction

• Similar but opposite reaction

• Different force and opposite reaction.

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 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)

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