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!
Physics 10-31-13 Friction & Normal Force from Tammy Skinner on Vimeo.
May Ryan, Candice, and I come after school Tuesday or Wednesday of next week to finish the lab where we were supposed to find the mass of the unknown object?
Still kind of lost on the problems, the lasts ones combined this chapter with the last one right?
I don’t know why but sometimes I struggle to understand certain aspects and circumstances involved with Newton’s laws. Like equal and opposite, but yet there still may be a net force causing movement. Wouldn’t that mean it wasn’t equal and opposite? I just need some help with some conceptual parts that might help me with the problems
Are we having a help session soon?
I’m still a bit confused on some conceptual stuff and setting up some problems. Any word on if there will be a help session Tuesday?