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- Unit Five — Physics of Simple Machines
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Rube Goldberg Machines — Complicated Machines with a Simple Purpose
At the end of our Simple Machines Unit, students made Rube Goldberg Machines — impossibly complicated machines made from many simple machines, with a very simple purpose.
Gears are Wheels and Axles
First - fourth graders learned about a new kind of wheel and axle — gears! Gears are wheels and axles with teeth which can make work easier by giving the user a mechanical advantage — allowing them to do more work with … Continue reading
Simple Machines
Machines help people do work more easily. Work is defined as a force acting over a distance to move an object in a direction. A simple machine is a machine with one or no moving parts. The ancient Greeks named … Continue reading
Rubber Band Cars
7th and 8th graders designed, created and tested cars powered by rubber bands and balloons. Students who had created balloon cars in a previous year were asked to try making a rubberband car. Rubberband cars are powered by attaching a … Continue reading
Balloon Cars — Newton’s Third Law
Students in all grades learned about Newton’s Third Law — for every action there is an equal and opposite reaction — by releasing a balloon rocket which traveled down a fishing-line track. This demonstrates the law because as the force … Continue reading
Newton’s Second Law
Newton’s Second Law states that the net force on an object equals its mass times its acceleration. IN other words, the bigger an object, and the faster it is moving, the more force it has. We know this instinctively. If … Continue reading
Newton’s First Law
Newton’s First Law states that an object in motion will stay in motion, and an object at rest will stay at rest. Students tested this out with their own experiments to demonstrate Inertia, the tendency of an object at rest … Continue reading
Friction — Fact or Fiction
First and second graders glided into friction facts by touching the surfaces of different kinds of objects — sand paper, waxed paper, foil — to see which was smoothest and which was roughest. Then they experimented to see which would … Continue reading
Greased Jello — the Facts of Friction
Students experimented with friction, the force that opposes motion between two surfaces touching each other. In a wiggling, wobbling experiment, students raced to see who could pick up jello fastest with wooden and plastic chopsticks. Not an easy task! With the … Continue reading
What goes up, must come down!
Students in all grades learned about force this week. A force is a push or a pull that gives energy to an object, causing a change in motion — a start, a stop, or a change in velocity or direction. … Continue reading
