Troubles with projectile motion Help

AI Thread Summary
A physics student is struggling with calculations for a tennis ball launcher project, needing to determine the horizontal landing distance and maximum height of the projectile. The challenge lies in the interdependence of distance and velocity calculations. It is noted that neither distance nor height can be calculated without knowing the launch speed. The advice given includes calculating the time to reach maximum height and working with variables while assuming the launch speed is known. This approach can help resolve the calculations needed for the assignment.
gidgetadores
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I've made a tennis ball launcher (tilted 45 degrees) for my physics class. The assignment is to calculate where the tennis ball will land horizontally and also how high it will go before falling back to the ground. The problem I am facing is that I need d(x) in order to find v(x), but i need v(x) in order to find d(x). If you know of any other equations I can use, that would be wonderful! This assignment is due tomorrow and I'm pretty desperate. Please help if you can!
 
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You can't calculate either distance nor maximum height without knowing the projectile's launch speed. That said, you can find a relationship between the distance the projectile travels and initial speed. Start by calculating the time it takes to reach maximum height and work from there. Work with variables, and assume that launch speed is known.
 

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