Hi all, I'm wondering if someone can help me out with a problem I'm having... I've been assigned a lab where I must build / buy a projectile launching device, and then determine the relationship between the launch angle and the range of the projectile launched. However, I have no idea where to start. The launcher has to maintain a close to consistant force when it launches the object, so I am unable to think of anything I could make / buy that could accomplish this. If anyone could help me out on any ideas to do, or something relatively cheap to buy, I'd be quite grateful. Thanks ahead of time.