[11-Forces 视频] 对力量不再一无所知 | Forces

Flying, pushing, pulling, falling, floating, bouncing, rolling, cycling... all movements are caused by a force.

You can't see forces, but you can see the effect they have on things.

They can speed things up, slow things down, make them change direction and change their shape.

Even things that are still have forces acting on them.

Forces are everywhere, all around us.

Think about the forces acting on you, right now!