| THRUST EQUATION | ||
At first, the movement of the train is very slow. However, the supply of cannon balls is being used up with the continuous firing, reducing the total mass of the train car. You've already learned that the force of the cannonballs must equal the force of the cannon/train car combo. (F=ma=ma) So if the force of the cannonballs stays the same, then the force of the train car must stay the same--but you've just seen that the mass of the train car is going down. What this means is that for the force to stay the same, the acceleration must go up when the mass goes down. As a result, the train car will accelerate faster and faster as the cannonballs are used. |
||
| 23 of 41 | ||