GREAT
EXPLORATIONS - Moving air | Forming
images | Reflecting light | Electricity
and magnetism | Spinning things | Making
sense | Changing colours | Making
sounds and waves | Moving to and fro
| Thinking about shapes
This is an old set of proven ideas, for reference. My latest designs are
far better!
Moving
to and fro
Dithering
pendulum
TEXT:
Swing the pendulum and watch what
happens.
Is it being pushed or pulled by the magnets
underneath it? Can you feel?
There is another magnet in the bottom of the
pendulum. Can you ever make it trace out exactly the same wiggly pattern
twice? Try.
Twisting
pendulum
TEXT:
Wind up the wheel, then let go.
After it has unwound, does it keep winding
itself up again?
Can you see "movement energy" being
changed into "height energy" and back again? Where is the friction
(rubbing) that wastes a little bit of energy each time?
The disc is suspended from two strong cords and fixed to a steel shaft
that rotates and slides inside PTFE (Teflon) bearings.
Double
pendulum
TEXT:
GENTLY set just one of the balls
swinging.
Stand back and watch what happens to the
other ball.
What happens to the first ball as the second
one begins to swing faster? Then what? Does the total amount of "movement
energy" of the two balls stay the same?
GREAT
EXPLORATIONS - Moving air | Forming
images | Reflecting light | Electricity
and magnetism | Spinning things | Making
sense | Changing colours | Making
sounds and waves | Moving to and fro
| Thinking about shapes
This is an old set of proven ideas, for reference. My latest designs are
far better!
|
