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Reasons for miscalculation of spring work and change in ke

by uknew
Tags: miscalculation, reasons, spring, work
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uknew
#1
Apr7-12, 11:57 PM
P: 14
can anyone help me in figuring out why i got different answers in my calculated value to my experiment value (or maybe its normal) when i calculated the aproximate distance a projectile would shoot up when i compressed a spring thru a distance. i calculated the spring constant and found the final velocity of the projectile once in projectile motion(which would make it its initial as a projectile).i checked the distance it traveled vertcally.compred it to my calculated one and they were very different. can anyone help explain why?friction, weight of the spring were not considered.thank
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uknew
#2
Apr8-12, 12:31 AM
P: 14
also how does cutting the spring change the stiffness or av. forfce exerted. ?will it go higher or the same?any help is good
Office_Shredder
#3
Apr8-12, 12:35 AM
Emeritus
Sci Advisor
PF Gold
P: 4,500
Hooke's law is under idealized conditions that you probably broke by compressing the spring as far as possible - at least this is a typical thing to do when shooting things up with springs. A full description of the setup and how you extracted the spring constant would allow us to better spot the problem

uknew
#4
Apr20-12, 11:34 AM
P: 14
Reasons for miscalculation of spring work and change in ke

oh ok thanks


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