Forces and Motion

Big Ideas: More info...

Objects interact with each other (by contact or at a distance) - giving rise to pairs of forces.
A force acting on an object causes its velocity to change; without a net force, its velocity is constant.

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An inertia meter

This apparatus gives students the chance to separate out the effects of mass from those of the pull of gravity, and that's...

Classroom Activity 14-16

In both cases, the skewer moves further through the apple each time you hit it because of the apple’s inertia.

Enrichment Activity 5-11 11-14

As you turn, the hanger remains almost stationary! The friction between your head and the wire is very low so the hanger doesn...

Enrichment Activity 5-11 11-14

The egg doesn’t go flying because the sideways force is only on the mat and the bottom of the tube, not the egg.

Enrichment Activity 5-11 11-14