Sir Issac Newton
Demos to Prepare:
Feel the Torque.
Meter Stick & Fingers.
Irregular Board & thread noose.
Roll Uphill?
The Horseman.
The Bird.
Forks & Toothpick.
The Nails, 10 on 1.
Conserve PE+KE with can rubber band and weight.
|Spinning thing on top of cabinet.
Earth-Moon system double wooden balls.
The Bridge.
Suicide Station Wagon.
Lift Stool, Boys can't.
TP Rip-off.
Roll Ring and Disk
Problem of the Balance.
Trusses use Vectors and Rotational Equilibrium
More Vectors and Torques in Action
Sample Torque Problem
Find the force needed to lift the left end
remembering that clockwise torques will
equal counterclockwise torques.
Two Factors that determine Equilibrium
Both rotational and translational equilibrium
must balance. The resultant will be balanced
by the equilibrant (ups = downs).
Sample Balance Problem
The fulcrum is at the center of gravity.
Solution to the Bridge problem
Super application of Vectors and Torques
When ordered to place columns in the Guildhall,
Sir Chris left 1 cm of space between the tops and
the ceiling. Four hundred years later, the spaces
were discovered! Wren's vectors held up the
ceiling without the columns! Heh, heh.
Boom is drafted to help Yogi in the assembly.
Vectors are to be applied to the Boom.
Yogi has Boom placed on two chairs where
Boom is in equilibrium for several minutes.
Click here for the weird story of
The Yogi
Here Endeth Chapter 8