Tricky Disks

Two wooden disks on an angled ramp

Concept Overview:

Equilibrium when potential energy is a minimum.

Lecturer Procedure

Task(s)	Expected Result
1. Place non-weighted disk in the center of the ramp. 2. Release disk.	Disk will roll down the ramp.
1. Place weighted disk in the center of the ramp so that the lead loading is on the top of the disk and facing away from the students. 2. Release disk.	Disk will roll up the ramp this time.

Task(s)

Expected Result

1. Place non-weighted disk in the center of the ramp.

2. Release disk.

Disk will roll down the ramp.

1. Place weighted disk in the center of the ramp so that the lead loading is on the top of the disk and facing away from the students.

2. Release disk.

Disk will roll up the ramp this time.