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Videos By Chapter
from
Inquiries Into Physics



 

 

 

 

Chapter 2: Newton's Laws

  1. Force and Torque
  2. Newton's First Law
  3. Mass and Center of Mass
  4. Different Forces, Different Motions
  5. Newton's Third Law
  6. Space Shuttle
  7. Universal Gravitation
  8. Tides

 

 

Newton's Laws Videos

Force and Torque

Discussion
Streaming
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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
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
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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
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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
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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
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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

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