Tug of War

When two teams are equally matched, the net force on the rope is zero.

What happens when there are three teams, and three ropes? Can they be balanced?

Sorry! Closed for renovation!

Sliding Block

When an object slides down a hill, we know the force of gravity is involved, and friction may also play a role.

But what is the force that mokes it go on a slant? Learn about the "normal force" in this interactive.

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Helicopter

When a helicopter takes off from the ground, there must be a net force to change its upward speed.

Can you safely land the helicopter?

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Curved Motion

A curved wall can keep a ball in a circular path. But what happens when the wall is removed?

What is the "natural" motion of objects?

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Vector Components

When a force or velocity is at an angle, it can help to look at them as having two parts, or "components".

Can you see how trigonometry functions help in physics problems?

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