Force and Torque |
Discussion |
Streaming |
Download |
Demo Page |
Mass on Spring, light
 |
A spring will be stretched a distance proportional to the amount of mass that is added to the spring. |
Real
|
Real
MPG |
|
Mass on Spring, medium
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A spring will be stretched a distance proportional to the amount of mass that is added to the spring. |
Real
|
Real
MPG |
|
Mass on Spring, heavy
 |
A spring will be stretched a distance proportional to the amount of mass that is added to the spring. |
Real
|
Real
MPG |
|
Fourteen-Hook Bar
 |
Different combinations of mass and distance are required to balance the torques on the stick. |
Real
|
Real
MPG |
|
Odd-Shaped Bar
 |
Different combinations of mass and distance are required to balance the torques on the odd shaped bar. |
Real
|
Real
MPG |
|
Torque Wrench
 |
Extending the length of a wrench's handle allows for more torque, allowing a person to loosen a stubborn bolt. |
Real
|
Real
MPG |
|
Newton's First Law |
Discussion |
Streaming |
Download |
Demo Page |
Tablecloth Pull
 |
The objects on the table tend to stay at rest due to their inertia. |
Real
|
Real
MPG |
|
Toilet Paper
 |
If you pull the toilet paper slowly, you will over come the inertia of the roll and pull off lots of paper. However, if you pull quickly, you cannot overcome the inertia and the paper rips off. |
Real
|
Real
MPG |
|
Inertia Rods
 |
These rods weigh the same, but due to the distribution of the mass, one is harder to rotate than the other. |
Real
|
Real
MPG |
|
Mass and Center of Mass |
Discussion |
Streaming |
Download |
Demo Page |
Magic Bird
 |
Only the center of mass of an object needs to be supported in order to support the object. The bird's center of mass in at it's beak. |
Real
|
Real
MPG |
|
Horse and Rider
 |
Only the center of mass of an object needs to be supported in order to support the object. The horse and rider's center of mass is under the hind legs. |
Real
|
Real
MPG |
|
Double Cone and Plane Trick
 |
Look carefully; the center of mass of the cone is actually rolling down hill. An optical illusion makes it look like its rolling up. |
Real
|
Real
MPG |
|
Feeble-minded Disk
 |
The center of mass of the disk is not in the center as you might expect. Thus, placing the center of mass off center can create the torque need to roll the disk uphill. |
Real
|
Real
MPG |
|
Different Forces, Different Motions |
Discussion |
Streaming |
Download |
Demo Page |
Simultaneous Fall
 |
One ball, having only a gravitational force, will fall straight down. The other ball, having gravity and a horizontal force, will follow a parabola. Watch it in slow motion. |
Real
|
Real
MPG |
|
Rotating Bucket
 |
The bucket (and water contained therein) experiences centripetal acceleration when swung in a circle. |
Real
|
Real
MPG |
|
Newton's Third Law |
Discussion |
Streaming |
Download |
Demo Page |
Exploding Carts, equal mass
 |
Because these carts are of equal mass, they will have the same velocities and momentums after release. |
Real
|
Real
MPG |
|
Exploding Carts, unequal mass
|
Because these carts are NOT of equal mass, they will NOT have the same velocities after release. Instead, their velocities are inversely proportional to their mass; i.e. the bigger mass will have the smaller velocity. Their momentums will still be equal. |
Real
|
Real
MPG |
|
