1Q10.31 Rolling Bodies on an Incline
Moment of inertia, torque
Different objects can be rolled down a ramp to compare the rate of descent. Objects include a can of watery soup, a can of creamy soup, hoops, cylinders, and spheres. The watery soup should win a race with the creamy soup because the watery soup does not need to rotate and does not contribute much to the moment of inertia.
-  Wooden plank
-  Backstop with foam
-  Can of creamy soup
-  Can of watery soup
-  Wooden stick
-  Brass hoop
-  Aluminum hoop
-  Aluminum cylinder
-  Red billiard ball
-  Steel ball
-  Aluminum hoop with styrofoam filling and cylindrical steel core
-  Lab jack
-  C-clamp
- Set up an inclined plane with the plank and lab jack.
- Place the backstop on the end of the ramp.
- Attach C-clamps to the end of the table behind the backstop to prevent the backstop from moving very far after a collision.
- Try not to let the cans and other objects acquire more dents!
- Ask students to make a prediction as to what objects will go faster moving down a ramp.
- Place the two objects on the ramp, using the wooden stick to keep them from rolling down the ramp.
- Raise the wooden stick to let them roll down simultaneously.
- Repeat as necessary.
- PIRA 1Q10.31, 1Q10.50
- Don't attempt this at home!
If you have any questions about the demos or notes you would like to add to this page, contact Ricky Chu at ricky_chu AT sfu DOT ca.