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- Hang a 1 Kg mass by a piece of masking tape (just wrap the tape around the hook of the weight). With the weight dangling, yank upwards on the tape. The tape will break if the yank is quick enough.
- Instead of yanking, hoist weight upwards slowly and tape will not break.
- Tape breaks much more easily than string, and is easier to hold on to.
Location
- Masking tape located in L35, above the sink, on a peg.
- Weight located in L02, section A1.
- Two identical disks with variable moments of inertia.
- Located in L02, section D3.
- Balls are identical in size, but vary in moment of inertia.
- Located in L02, section D-3.
- Though wands have identical mass, one is much more difficult
to handle.
- Hold wand (meter stick) at 50 cm mark with one hand. Twist
wand back and forth like a baton.
- Located in L02, section D-3
- Demonstrate the relationship of moment of inertia to angular
acceleration.
- Located in L02, section D3. Ramp located in L02, section
D1.
- Demonstrate inertia of rest.
- Lay your hand flat on a table top then gently rest a lead brick on top of it, being careful not to placing too much weight on the knuckles. Strike the top of the brick with the hammer. If done properly, demonstrator should be able to hit with nearly full force without hurting hand. Please practice before performing in class using light blows, then steadily increase force.
- Alternatively, rest lead brick on a piece of hard candy, then whack with hammer.
- Lead brick absorbs the blow, leaving the candy (or hand) undamaged.
- Located in L02; section B3.
- Lead brick in demo room is covered with duct tape for safety
and ease of use.
- Purpose: Demonstrate principle of inertia.
- Pull tablecloth out quickly with a downward yank (you can
imagine what an upward yank would do).
- Located in L02, section B3
- Two simple devices that do what the”pulling out the table cloth” demo does. These are easier to use, though not as impressive.
- Located in L02, section B-3.