#### Transcript of Newtons Law Of Motion

**Newton's Law Of Motion **

Newtons Law Of Motion

Newton's laws of motion are three physical laws that together laid the foundation for classical

Newton's First Law

(Law of Inertia)

An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Newton's Second Law

The acceleration of a body is directly proportional to, and in the same direction as, the net force acting on the body. F = ma, where F is the net force acting on the object, m is the mass of the object and a is the acceleration of the object.

Newton's 3rd Law

For every action there is an equal and opposite reaction.

Example 2

When sitting on a bench, your body exerts a force on the bench and the bench exerts an equal force back if the bench didn't exert the same force you would fall on your butt.

This photo shows a bowling ball hitting pins. Now the ball starts out in your hands. While the pins stay at rest. Once the you roll the ball, the ball will hit the pins. Then the pins will no longer stay at rest.

Example 1

F=MA (1000kg x .05 m/s/s) =

Force= 500N

Example 2

F=100N / M=50kg

A=50 m/s(2)

It shows a guy pushing on a car. We don't not how much force he is giving. But we know the car is 1000kg and it's pushing off .05 m/s/s.

So we just multiply to get the answer.

The picture shows of a 100N guy pushing a 50kg bag. If F=MA and there is no acceleration we have to divide, both the Force and Mass to get our answer, as shown below.

Example 1

It shows a guy hitting a baseball. Someone throws a baseball at him first. Then he hits it with his bat. After that it bounces off the bat and fly's.

Examle 2

This picture shows a cup of coffee on top of a car. Now right now the coffee is a rest but if the driver pulls off the cup will slide of the back. It does that because it would want to stay at rest. Since it was acted upon by another force it is no longer at rest.

Summary of Newton's Law Of Motion

By: Jathan Offutt

Date: November 11, 2013

Inertia: the resistance of any physical object to any change in its motion (including a change in direction).

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