Water Rocket Computer Model Problems

Answer to problem 1

Answer - 320 x 240 pixels GIF


I asked for an explanation for the following . . .
1. to find an explanation for the large central maximum (B); and,
2. the maximum at the top edge towards the left (A).

First of all, the rocket uses a Launch Tube and a T-Nozzle. This means that when the weight of the rocket and the water combined is low, the speed will be high. This explains the maximum at point C which represents a high initial velocity.

The area of non-viable flight at the top and to the right of the view is caused by the rocket still having water in it when it hits the ground. This gives a clue as to the nature of area A. Area A is the result of the rocket reaching a high speed before it hits the ground and is caused by the rocket still having enough water on board so that it just runs out before impact. In this state, acceleration, assisted by gravity, gives a maximum velocity around area A thus a high terminal velocity as it is driven into the ground.

Area B happens to be where there is a maximum in the height. Thus, area B corresponds to maximum velocity reached as a result of having the longest way to fall.

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