Physics 4.1 Impulse and Newton's Third Law

What is Newton’s Third Law?

Every time a force is exerted ON an object, there is simultaneously an equal and opposite force exerted by that object. FORCE ALWAYS OCCURS IN PAIRS!

What is impulse?

The cause of change in momentum.

What is impulse momentum theorem?

J = F x T

To change an object’s momentum you can apply either…

A BIG FORCE over a SHORT period of TIME or a SMALL FORCE over a LONG period of TIME

As time of impact increases so does what?

force of impact

What about pairs with different masses?

For pairs with different masses, this equal and opposite force creates different accelerations according to Newton’s 2nd Law.