Which course are you taking?
You can change this later with the Level button at the top.
Before the bench unlocks
Speed
⏸ Paused. Press Space or Play.
How to use the bench (mouse, touch, or keyboard)
- Time: Play runs the scene. Speed goes from ×0.1 (slow motion) to ×5. → (or Step) moves one sensor reading (0.02 s) while paused; Shift + → moves half a second.
- Forces: tap (or click) an object to show its free-body diagram; point at an arrow to name it. The forces card at the side lists every force with its value.
- Push: in Explore, drag the cart or the block to push or pull it with your hand.
- Zoom: drag the zoom slider, scroll over the picture, pinch on a touch screen, or press Z / X. On a sliding block, zoom all the way in to see a model of friction.
- Keys: Space play / pause · → step · R reset · Z / X zoom · H help.