Physics 11-5-12 Friction & Normal Force

PHYSICS: So why don’t things that are moving just keep moving? Here’s the intro lecture on friction. Remember a few key things. 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!

Have a great time at the polls tomorrow! Be safe!!

flickr photo by kbaird

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5 thoughts on “Physics 11-5-12 Friction & Normal Force

  1. Ms. Skinner, do you have any tips for keeping track of all of the forces? I’m drawing pictures, but I feel like I’m forgetting forces.

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