Forces and Newton's Three Laws

So far this year we've learned about motion. For the next several months we'll learn about forces. Newton's three laws relate motion to forces.

Free body diagrams are used to figure out the total force on an object. There is an interactive animation that demonstrates free body diagrams, and also a worksheet on them.

A force that often has to be dealt with is friction. Here is a molecular view of surfaces rubbing together causing friction. An extreme case of friction is the tires of a drag racer. Here is a slow motion video of the tires gripping the road. Another interactive animation shows the effect of friction on objects sliding down a ramp.

Here is a copy of the friction lab, and this video could be very helpful on one of your homework problems.

And lastly, here is a segment from Cartalk, where they talk about fuel efficiency, speed, and air friction.

Student Web Pages

Types of Forces (TD)

Newton's three laws (EL)