Wednesday January 19

Today we reviewed for the Unit 4 Test TOMORROW.

DO NOW:
1. What is the objective of today's class?
2. What is a force?
3. Momentum depends on 2 things: ____ and _____.
4. You slap your friend's face. What is the action force? What is the reaction force?
5. When is your Unit 4 Test?

CLASS WORK:
You will do the following in your notebook. Answer all the questions at Stations 1-6:

Station 1
1. Match the following quantities to their appropriate units. A quantity can have more than 1 matching unit.
2. A fat cat crawls 10 meters in 5 minutes. What was the cat's average speed?
3. What is the difference between speed and velocity?

Station 2
1. The following data chart describes the motion of a runner. Plot it on a X-Y graph.
              Time (s)       Distance (m)
                   0                     0
                   5                   10
                  10                  20
                  15                  20
                  20                  40
2. During what time period (other than at time zero) is the runner motionless?
3. What is the runner's average speed for the entire 20-second period?

Station 3
1. State Newton's 1st Law of Motion.

Station 4
1. Fill-in-the-blank: ____ = mass x acceleration
2. Your bike has a mass of 9kg. You accelerate at a rate of 2 m/s2. Calculate the net force that is accelerating the bike.
3. you are pushing your short 100 kg cousin on the swing. His tall 200 kg friend then runs up to you and ask you to push him instead. He said that because he's taller, he is less dense and thus requires less force to move. Do you agree? Why/why not?

Station 5
1. State Newton's 3rd Law of Motion?
2. Identify the action/reaction force pairs in the following situations:
a) Jill pushes (exerts a force on) a table.
b) A rocket takes off from the ground.
c) Sam is sitting on a chair.

Station 6
1. What is momentum?
2. Fill-in-the-blank: Momentum depends on two things: ____ and ____.
3. Which statement best describes a force that the driver and passenger experience together in a car?
a) Velocity moves them forward against their seat belts when the brakes are applied?
b) Momentum moves them forward against their seat belts when the brakes are applied.
c) Velocity pushes them against their seats when the car is moving at a constant speed.
d) Momentum pushes them against their seats when the car is moving at a constant speed.

HOMEWORK:
Finish your Unit 4 Test Study Guide! Your test is tomorrow!