How Can You Build a Self-Propelling Boat That Also Launches a Projectile?

[FakeGeek]

Homework Statement

1. The Project
I must build a boat that is able to propel itself via elastic or gravitational energy 1.0 metres. After it has moved 1.0m, it must automatically shoot a projectile 2.0m perpendicular to the movement.


2. Rules
The boat cannot touch the bottom of the 10 cm deep pool.
Any solid projectile may be used.

3. The Attempt at a Solution
I tried the string timing mechanism..Basically a string is pulled tighter as the rotary paddle of the boat spins, which would then trigger the catapult(which is the a mousetrap).
The problem with that is there is too much drag under water which doesn't provide enough tension force on the string to activate the mousetrap...
What other methods are there that are highly practicable and easy to do(the boat is due tmr)...
Any help is appreciated!

 

[anathema]

Hello, I am a scientist and I would like to offer some suggestions for your project. It seems like you have a good understanding of the problem and have already attempted a solution. However, as you have mentioned, the drag under water may be causing issues with your current setup.

One possible solution could be to use a compressed air system to power the boat and trigger the catapult. By using compressed air, you can avoid the drag from the water and still have enough force to propel the boat and trigger the catapult. You could also use a solenoid or other electrically powered mechanism to trigger the catapult.

Another option could be to use a spring-loaded mechanism to power the boat and trigger the catapult. This would also avoid the drag from the water and provide enough tension force to activate the catapult.

It is important to also consider the weight and balance of the boat in order to ensure that it can move 1.0m and shoot the projectile accurately. You may need to experiment with different designs and materials to find the most effective solution.

I hope these suggestions are helpful and I wish you the best of luck with your project. Remember to always prioritize safety and have fun with your scientific exploration!