Revised Mouse Trap Vehicle Grade Scale

In light of the fact that this year project grades are based on two separate test, the new grade scale is as follows:

D = 10-12.99 meters

D+ = 13-14.99 meters

C- = 15-16.99 meters

C = 17-18.99 meters

C+ = 19-20.99 meters

B- = 21- 23.99meters

B= 24- 27.99 meters

B+ = 28-29.99 meters

A- = 30 -32.99meters

A = 33-34.99 meters

A+ beyond 35 meters

Link to Coefficients of friction

Here is a link to table of coefficients of Friction. Make sure to only look at the kinetic or rolling coefficient.

Chap 7 Numbered Heads Review Instructions and Concepts

1. Form into the designated groups

2. Take out one full sheet of paper per group and list the name of the group at the top. Then list the names of the group members and place numbers next to each name (1, 2, 3…..If four members then write 4 also). It doesn’t matter who gets what number.

3. Hand the paper to the instructor. It will be used for assessment and graded.

4. Begin reviewing/ learning the listed concepts. Make up sample questions related to the concept. Try and figure out what question the teacher will ask. Time is limited; so don’t waste it!

5. Once you understand the concepts make sure each group members also understand by assessing them. Do not ask yes or no assessment questions.

Good Assessment. “Sam, could you show me how to do number three on the list?”

Poor Assessment. “Do you guys all know it?”

6. When the instructor calls a number randomly (ex. = 3) the three will go to a designated area alone and respond to a similar question. Make sure they have something to write with and a calculator. After they leave begin studying the next set of concepts for the next round.

7. After a short amount of time the person will then return to the group and their answer will be graded by the teacher and given to the entire group as a communal score.

8. The returning group member may be called again so they should receive extra instruction to help get caught up.

9. The scores are added at the end to determine winners. The top three groups receive extra points on the test.


Chap 7 Concepts

1. Calculate change in momentum for a 2 kg ball that hits a ball at 3m/s and bounces off the wall at the same speed.
2. Calculate impact force for a 5 kg object hitting at 2 m/s and coming to rest in 2 sec
3. Find momentum for a 10 kg object that goes 200m in 2 seconds
4. Find the mass of a ball given its speed and momentum.
5. Find the speed of a ball given its mass and momentum
6. Evaluate who has greater impulse, a light car or heavy one pushed by the same force over the same distance
7. Evaluate collision of Superman throwing an asteroid. What should happen?
8. Impact force for a falling object of known weight. What quantities are required?
9. Recoil for “almost” throwing a ball on roller skates
10. What makes an elastic collision?
11. Force, impulse, change in momentum, time of collision for a karate chop on a board
12. Time of impact for stiff legged jump versus bent legged jump
13. Definition of momentum
14. Calculate relative increase in momentum when you double speed or triple speed of a car
15. Why have padded dashes in cars?
16. Table tennis ball and launcher force, impulse, momentum change, and time of collision
17. Why speed of a cannon recoil is small in relation to cannonball
18. Why move hand backward when catching a ball?

Cool Rocket Science

Here is a great teacher who developed a science program around model rockets