C and F Blocks spent the period tidying up loose ends with friction and air resistance and reviewing for tomorrow's exam. We walked through the chapter page by page highlighting what to pay attention to and highlighted the math skills you will be required to demonstrate. Although there are only two new formula pieces added this chapter - F
net = ma and μ
k,s = F
k,s/F
N - using those formulas is not necessarily straight forward and require careful reading of the problem and drawing accurate force diagrams to puzzle out. Also, be on the look out for the need to perhaps use a kinematics formula to work out acceleration for a calculation of net force. Now, I tried to make this obvious in class, but in case you weren't listening, expect a couple of short answers, one of which is going to be an incline problem. Don't be surprised if you are asked to:
- Calculate the weight of an object
- Calculate the normal force acting on the object
- Calculate the force pulling it down the incline
- Calculate the force of static friction holding it stationary on the incline
- Calculate the coefficient of friction between the incline and the object
So come ready to tackle that and if you need help, see me before school tomorrow.
B and E Blocks finished up with friction and air resistance in class today. B Block reviewed their homework problems for friction and their Chapter 3 exams and E Block finished their discussion of friction and will go over their friction problems tomorrow. Come with questions as we review for Friday's exam and see me before school if you need any additional help.
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