A cone is glued to a hemisphere. When you place it on a table in
what position does it come to rest?
Bricks are 20cm long and 10cm high. How high could an arch be built
without mortar on a flat horizontal surface, to overhang by 1
metre? How big an overhang is it possible to make like this?
Balancing interactivity with springs and weights.
Balance the bar with the three weight on the inside.
If you were to set the X weight to 2 what do you think the angle
Attach weights of 1, 2, 4, and 8 units to the four attachment
points on the bar. Move the bar from side to side until you find a
balance point. Is it possible to predict that position?