|Nov1-10, 04:08 PM||#1|
Find the work
I'm not able to get any of the multiple choice answers. Please help.
a force of 1100 lb compresses a spring from its natural length of 17in to a length of 14in. How much work is done in compressing it from 14in to 9in?
What i did was F(x)=kx => 1100=3k => k=366.7
W=∫366.7x dx from x=3 to x=8, which equals 10084.25
is this answer correct?
|Nov1-10, 04:58 PM||#2|
I get 10,083.3 (in-lb), which is close to what you got. My answer differs from yours because I didn't round 1100/3.
The answer closest to this is c, for what it's worth.
|Nov1-10, 05:02 PM||#3|
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