GOALS: SWBAT....
1. describe how the magnitude and direction of object's momentum affects the outcome of a collision.
2. define elastic and inelastic, and give (or identify) examples of each
3. Solve 2-dimensional conservation of momentum problems
WARM-UP
Predict the Outcome...
http://www.physicsclassroom.com/mmedia/momentum/2di.cfm
1. Which car has more momentum? How can you tell?
2. Which car wins in the collision? Another way of thinking about this... Which car has a smaller change in direction?
3. Would this matter for the occupants? Why? Another way of thinking about this - would being in the car with the smaller change in direction be better or worse? Why? (Give examples)
CLASSWORK
1. Quiz (open notes from last class)
2. Review of 2-D problem solving
pg 242 Example Problem #4
3. Practice with 2-D
Testers: pg 243 #23-25
Non-testers: pg 243 #25 and pg 253 #79
4. CH 9 Exam is Friday
Flipping Physics review videos are here in the Momentum & Impulse section:
http://www.flippingphysics.com/algebra.html
Practice Problems: You should know how to solve each of these: pg 250-255: 47, 59, 65, 70, as well as problems 33, 34, 36, 38, 39, 40, 42 and the two problems written out below:
A. A 975g car "C" moving south at 22.5m/s, collides with a 2156kg truck "D", moving west at 17.5m/s. They stick together. In what direction and with what speed do they move after the collision?
B.
We will review some of these problems in class Wednesday.
Thursday and Friday I won't be here, so if you have questions, you'll need to ask Wednesday, or via Remind/email.
HOMEWORK
Create a notes sheet for the CH9 exam
Work on practice problems listed above, and bring them in for some extra credit, and make up any leftover Day 71 CW
#Goals: SWBAT...
1. ... review the basic components of "Power"
2. ... solve advanced work and power problems involving forces at diagonal angles
3. ... calculate the power output of a person climbing stairs
WARM-UP:
R.I.P Prince
1. A rope is used to pull a metal box a distance of 15.0 m across the floor. The rope is held at an angle of 46.0° with the floor, and a force of 628 N is applied to the rope. How much work does the force on the rope do?
CLASSWORK:
0. HW Review
1. Power Lab data collection
2. Power Lab Analysis
TASKS:
Calculate and Fill-in a Typed Data Table
Divide the "Conclude", "Apply/Going Further", and "Real World Physics" questions so each member has a fair amount.
End of day check:
- Have you shared or emailed the data table and graphs to all group members?
*Note to self: Never tell a girl she generates the most power when climbing stairs....
3. Lab Requirements:
Typed.
Introduction (answer the main question by presenting your hypothesis)
Data (data table and graphs go here)
Analysis Section
- will be completed in parts. Each group member will answer one to four questions. Those will be turned in on the due date (Friday 04/29), and will be the sole responsibility of the group member to which they are assigned.
Conclusion (was your hypothesis correct?)
HOMEWORK:
1. Chillflix and chill