| A11-9 | Action and reaction - fire extinguisher on cart. |
| Purpose: | To demonstrate action and reaction. |
| Description: | A fire extinguisher is fixed on the back of a chair which is fixed on a cart. When the handle of the fire extinguisher is squeezed, the flow from the nozzle of the fire extinguisher pushes the cart to move to the opposite direction. |
| References: | |
| Equipment: | Fire extinguisher without the rubble nozzle and a cart with a chair. |