Physics 11-3-20 Friction & Normal Force

PHYSICS: Why don’t things that are moving just keep moving? Here is our intro on friction from today. And don’t forget – net forces produce acceleration.

You can find Ff a couple of different ways – it’ll be part of a net force equation and can be found from the coefficient of friction equation. If and ONLY if your object is moving at a constant velocity, Ff will equal Fa. Fn is only sometimes equal to Fw. If your object is pulled at any angle (or pushed), Fn will be a part of Fnet in the vertical direction.

Whew! 🙂


flickr photo by kbaird

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