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How to make a ruler catapult

How to make a ruler catapult
You will need

Short ruler
Elastic band (quite thick)
Bulldog clip-Small enough to fit on the end of your ruler


                                                               I FORGOT PICTURES SO I DREW THEM!
 
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Step 1I dont really know what to call it . The final step?

I dont really know what to call it . The final step?

Put the bulldog clip on the end of the ruler then put the elastic band onto the bulldog clip. Then use pencils to fire.

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1 comment
May 8, 2011. 11:25 AMhamsTheMan says:
150cm that isnt short?

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