- #1
JWDavid
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Homework Statement
spring-loaded gun on tabletop. Target box 2.20m horizontally from edge of table on floor.
Shot 1 - spring compressed 1.10 cm - falls 27 cm short.
How far should the spring be compressed to hit the target with shot 2?
Homework Equations
GPE1 + SPE1 + KE1 = GPE2 + SPE2 + KE2<br>
0 + k(x2)/2 + 0 = mgh + 0 + 0
The Attempt at a Solution
I've been beating myself up trying to solve this one and the next one I'll post and I don't know where to start. <p>
I tried:<br>
to use a range solution (V2Sin(2Theta)/g) and cut it in half to get the initial velocity so I could attempt to figure out KE (mV2/2 - but don't have an angle<p>
to figure out time of flight - but don't have the height of the table<p>
I don't have a spring constant for it. And I just don't think I should be using proportions to determine the answer, not this late in a physics (w/calculus) class.<p>
I don't know where to start, and btw it didn't give me mass either.<P?
Thanks in advance
o