Sunday, March 20, 2011 at 7:49PM Eggs have an arch design in which compression forces are diverted from the top and bottom of the egg down to the sides. How much compression force can an egg take before it's smashed? Watch the video!
Monday, March 14, 2011 at 5:20AM How does a pendulum work? Why can't the weight of the pendulum ever go as high as the starting height? Watch the video to find out.
Wednesday, September 15, 2010 at 12:36PM A simple demonstration of Newton's 3rd law of motion in action. A rubber band under tension is cut, launching both the sled and the launching mechanism in equal and opposite directions.
Wednesday, September 8, 2010 at 10:45AM This is a fun and easy demo to teach what happens to objects when forces are acting in the same direction. A series of balls are dropped together, one on top of another. The forces are added together, creating a larger force that propels the top ball to a much greater height.
Sunday, August 22, 2010 at 8:48AM
Inertia is the tendency of an object to resist a change in its motion. An apple and a knife are moving downward. The counter-top applies an unbalanced force upward on the knife. The knife decelerates, but the apple does not. The apple decelerates only when the knife handle applies a force upward on it.
