Newton's Third Law of Motion

3rd Law example-

*Every action force creates a reaction force that is equal and opposite force.*

What is the *math problem* used in Newton's 3rd Law?

*F=MxA*

When a bug traveling west hits the windshield of a car traveling east, what can be said about then collision?

*SAME!* the bug and the car feel the *same size force.*

If a brick is sitting on a table. The force of gravity pushes down on the brick. What prevents the brick from accelerating downward and falling through the table?

*The upward (normal) force of the table on the brick keeps it from going through the table.*

True or False - There can never be a single force?

*True*, forces only come in pairs.

Why don't action and reaction forces cancel each other out?

Action and Reaction forces act on different objects and (sometimes are the SAME!)

Collision

An instance of one moving objects pushing against another. *Even thought the forces are equal the effect of the force isn;t always the same.*

Newton's Third Law

For every action force there is a reaction force equal in strength and opposite in direction. (all force comes in pairs)

If an object has less mass then there is how much inertia?

Less inertia

If an object has more mass then there is how much inertia?

More inertia

Restate Newton's 3rd Law in your own words.

Newton's 3rd Law is an objects opposite force will have and action and reaction equal force.

Describe the collision between a beetle and a garbage truck.

The collision between a beetle and a garbage truck is *the truck has more mass and more inertia. The action force of the beetle and the reaction force of the truck result in a greater acceleration of the car because it has less mass.*

Describe an action-reaction pair of forces of a baseball player hitting a ball with a bat.

The force of the bat on the ball accelerates the ball (action) the force of the ball on the bat slows down the swing (reaction).

*THERE CAN never BE A SINGLE FORCE, ALONE.-*

Without its acton-reaction partner. Forces *ONLY* come in an action-reaction contest, the force exerted by the object (action). The reaction force acting back on the object was what moved the other object.