Thursday March 3rd

THE UNIT 5 TEST HAS BEEN POSTPONED. YOU WILL TAKE THE TEST TOMORROW (FRIDAY 3/4).

Your notebook check will be next week Friday.

DO NOW:
1. When is your Unit 5 Test going to be?
2. When you place a rock on the top of a cliff, it has a lot of ___________ energy. When you knock it down, the PE is changed to ______________ energy.
3. Assuming no air resistance, if you start out with 400 J of PE, how much KE do you end up with?

CLASS WORK:
Solve these problems in your notebook:
1. Calculate the work done when a 20N ball is thrown 5m.
2. Jenny (weight 300N) runs up the 2m stairs in 5s. What was her power output?
3. Mechanical advantage tells you how much easier or faster a machine makes your work. Calculate the mechanical advantage of a ramp that is 15m and 5m high.
4. A toy car with a mass of 2kg is sitting on top of a 4m stool. How much potential energy does it have?
5. Assume no air resistance. Your sister throws a 2kg ball across the room with a speed of 5m/s. How much kinetic energy does the ball have?

HOMEWORK:
Finish the Unit 5 Study Guide (if you haven't already).

Study for the Unit 5 Test tomorrow!

GOOD LUCK!