Rotating chair with dumbbells or weighted bicycle wheel.

1Q40.10 • A+30+15

diagram for demo

The three dumbbells. A sturdy chair with arm rests is mounted on a ball-bearing axle. A person seated in the chair holds a heavy 'dumb-bell' weight in each hand, with arms extended. The chair is rotated and the seated person draws the weights in to the body to increase the speed of rotation. The chair may be slowed by extending the weights. Note: a bicycle wheel with weighted rim and long handle, and bicycle wheel with 2 handles are available as gyros on request.

gallery

Related Demos

1Q40.23 Mechanical governor device. 1Q40.11 Minor's apparatus: Movable discs rotated by falling weight. 1Q40.40 Train on circular track moves one way and track moves the other.
A+30+65 Bike with one foot long trail A+30+70 Hoop thrown forward rolls backwards A+30+0 Minor's apparatus: Movable discs rotated by falling weight. A+30+5 Maxwell's wheel: Flywheel with axle, supported on strings or stand. A+30+10 Rotational inertia device: Sliding weights on rotating rod. A+30+20 Maxwell's top, has adjustable center of gravity. A+30+25 Large conical aluminum top. A+30+30 Gyroscopes; various. A+30+35 Sire's Polytrope. A+30+40 Film: "Conservation laws in zero G", sound, 14 min.. A+30+45 Large gyroscope in a suitcase. A+30+50 Rotating Platform for Outreach A+30+60 Spinning Bicycle Wheel Stays Upright. A+30+55 Falling coffee cup is arrested by friction