energy hw again

Don't forget - quiz next Wednesday.

more practice:

Chapter 8:  65, 53, 71, 57

If time allows:  38 and/or 39 (for calc practice)

hw

Review today's problems - make sure that they make pretty good sense to you.

Try these:

Chapter 8:  63, 67, 88

Note that the work done by friction (W = F x) can be given by:  W = f x, where f is friction force.  And recall that coefficient of friction (u) is given by:  f = u N  (friction force = coefficient x normal force)

Read chapter 8:6 and note equation 8-22.

More energy HW to play with.

Apologies for not sending these earlier.  If you don't get to them, I understand.

1.  Try the problem described in class last day.  Answer:  d = (3/5) L

2.  Problem to play with - it's one of my all-time faves.  Chapter 8:  36.  You need to combine circular motion and energy again.  Try your best.

3.  Chapter 8.22, 8.25

FYI - we're covering chapters 7 and 8 simultaneously.  I'm assuming that you're using the 7th edition of Halliday/Resnick/Walker.  Am I right?

We're next going to cover momentum and collisions, chapter 9.  Then we'll try a formal lab report that will include energy transfer, collisions and rockets (oh yeah!).  Rockets are on order.

See you tomorrow.

Hi! Play with these problems!