Scratch

terminator355 · 2008-09-02 00:27:41

im making a cpolt and need to know how to make the ball go far based on how many bands you have and how much tenchion

Paddle2See · 2008-09-02 03:24:24

You are making a catapult? Or a Scratch project about a catapult?

I'm helping to build catapult too! My son and I are working with the Latin Club at the local High School to help them with their catapult contest. Our design is going to throw a softball. It is powered by twisted rope. We will probably be using about 300 feet of 1/4 inch nylon rope. The distance between the sides of the catapult is 3 feet. We have heavy steel rings and bars to hold the ropes as the forces get very large when the bundle of rope is tightened.

I would be interested to hear what your design looks like and what you are planning on throwing.

terminator355 · 2008-09-02 09:57:47

im making a cpolt in a Scratch Project.

jon182 · 2008-09-02 10:28:48

make a variable lets say streinght. and it changes by 1 whenever someone presses the key that "pulls back" the caatupult. then make it so that the "stone" is fired and moves a certain x then y per second X the number of strength. (use waits if needed) untill it touches the ground.

Paddle2See · 2008-09-02 11:20:51

You could start with a good velocity based projectile project like this one

http://scratch.mit.edu/projects/archmage/84286

and set the initial velocity (look for a variable by that name on the ball sprite) based on the tension placed on the catapult. It might give you a good starting point.

Scratch

archived forums

#1 2008-09-02 00:27:41

help with catapult

#2 2008-09-02 03:24:24

Re: help with catapult

#3 2008-09-02 09:57:47

Re: help with catapult

#4 2008-09-02 10:28:48

Re: help with catapult

#5 2008-09-02 11:20:51

Re: help with catapult

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