10/31

Happy Halloween!

Objective:  SWBAT begin to review for Wednesday's test.

Warm Up:  Pick up one handout and your graded papers.
50,000 J of work were done on a 500 kg roller coaster to bring it to a stop.  How fast was the roller coaster going when the brakes were applied?  

Reminder:  Ch 6 HW is due tomorrow 11/1.

10/28

Objective:  SWBAT calculate problems involving the Law of Conservation of Energy.

Warm Up:  Consider the old fashioned roller coaster on the board.  Calculate the gravitational potential energy at the top of each hill.

10/26

So far, we have done no work in this class.  Time to get to work!!

Objective:  SWBAT calculate the work done on or by an object, as well as experimentally determine the work and power needed to walk and run up stairwell # 3.

Warm Up:  Write a definition of the terms work and power.

Reminder-  All late work and extra credit is due today.

10/24

Objective:  SWBAT review for tomorrow's test on uniform circular motion.

Warm Up:  Pick up your graded papers. 
A  500 kg car drives over the top of a hill that has a radius of 30 m.  What is the maximum speed can the car be going without going airborne at the top of the hill?

10/20

Objective:  SWBAT review forces including centripetal force.

Warm Up:  Turn in your beanie baby lab if you haven't already.
A mass on the end of a string moving in a vertical circle.  Draw free body diagrams for the points on the circle indicated on the white board.

Ch 5 Homework due Monday!

10/19

Objective:  SWBAT experiementally determine the mass of a rubber stopper in uniform circular motion.

Warm Up:  Find two other students to work with (groups no larger than 3!), take a seat and quietly wait for Mrs. Heyes to demonstrate the proper technique for spinning your rubber stopper.

See post below for extra credit opportunity for the 1st Quarter.  It is due no later than Wed. Oct 26.

1st Quarter Extra Credit

Go to http://www.archive.org/details/ThrillDriversChoiceProjectile and view the video.

This 1956 commercial for Chevrolet shows a troupe of men driving regular Chevrolet cars, not the

“souped-up models.” They perform a variety of tricks including, at about 0:34, a jump from one ramp to

another. This is a simple projectile motion problem.  Using the video of the jump:

1)      Estimate the time of flight:

2)      Estimate the launch angle:

3)      Estimate the car’s speed:

4)      Calculate the range:

5)      Calculate y_max: