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Tennis ball gun, muzzle velocity

  1. Dec 6, 2015 #1
    I am designing a tennis ball gun and am trying to work out the forces involved. It is essentially elastic powered but at this stage all I need to know at this stage is this: with the gun at a 20 degree incline what muzzle velocity would result in the ball travelling 50 metres?
  2. jcsd
  3. Dec 6, 2015 #2
    Are you familiar with the SUVAT equations?
  4. Dec 7, 2015 #3
    Sorry for delay, but no, however will google them after this reply, thanks for lead. My problem is this, I think I have a viable design for imparting a fair amount of velocity to the ball. It uses a dense coil of catapult elastic which is stretched using a geared crank. releasing the coil propels the ball via a bellows type arrangement which in effect is a large caliber pea-shooter. I want to estimate the range of the design as it stands to see if it will reach the minimum 50m range. To do this I guess I need to find muzzle velocity and then find the amount of energy needed to accelerate the ball to that velocity. Then I need to figure out the amount of energy that can be stored by the elastic. I am hoping the quantity of elastic in the design is sufficient to acheive the range. Any further hints welcome.
  5. Dec 7, 2015 #4
    It looks like you have the right idea.
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