January 1, 1980 • 5m
How can physics be about movement if nothing wants to move? Ah, but forces in the universe make things move and stop moving. But...Read more
January 1, 1970 • 5m
This program introduces the kilogram as a way to measure the mass of an object, and proves that small things can me more massive than large things.
January 1, 1970 • 5m
Expert ball-handling proves force varies with mass and speed.
January 1, 1970 • 5m
Force varies with mass and rate of change of speed. It's much easier to stop a slow-moving cannonball than a rapid tennis ball.
January 1, 1970 • 5m
It takes only a few seconds for something to accelerate to a max speed. This is demonstrated with a vintage locomotive.
January 1, 1970 • 5m
What is gravity? Through the fictional story of Newton's apple, we learn about gravity and shed some light on weight.
January 1, 1970 • 5m
Physics has to be specific in distinguishing weight from mass. This is why physicists measure weight in newtons.
January 1, 1970 • 5m
How much work are you doing? Whatever the force you apply is measured in newton meters–or joules, after James P. Joule.
January 1, 1970 • 5m
The physics of billiard balls begins the first of two programs on energy itself.
January 1, 1970 • 5m
David and Goliath characters demonstrate how potential energy differs from kinetic energy.