Physics
Ah, it's right. Thanks alot!
Physics
The cable of an elevator of mass M = 1020 kg snaps when the elevator is at rest at one of the floors of a skyscraper. At this point the elevator is a distance d = 18.4 m above a cushioning spring whose spring constant is k = 6500 N/m. A safety device clamps the elevator agains...
Physics
Um are you saying Wtotal = [(1020)(9.8)-6678] (18.4+x) ?.. In that case, I did the quadratic and got x=17.33m, but still wrong answer :( argg
Physics
Wtotal = [(1020)(9.8)-6678] 18.4 = 61051.2J 61051.2J = 1/2 (6500)x^2 x = 4.33m STill wrong :( Help
Physics
The cable of an elevator of mass M = 1020 kg snaps when the elevator is at rest at one of the floors of a skyscraper. At this point the elevator is a distance d = 18.4 m above a cushioning spring whose spring constant is k = 6500 N/m. A safety device clamps the elevator agains...
Another binomial distribution question
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binomial distribution
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maths
hey, i would really appreciate some help solving for x when: sin2x=cosx Use the identity sin 2A = 2sinAcosA so: sin 2x = cos x 2sinxcosx - cosx = 0 cosx(2sinx - 1)=0 cosx = 0 or 2sinx=1, yielding sinx=1/2 from cosx=0 and by looking at the cosine graph, we conclude that x=pi/2 ...
maths
hi, i'm having trouble with this question: The cost of running a train at a constant speed of v km/h is C=50+v^2/1000 dollars/hour find the time taken for an 800km journey in terms of v.
differentiation
hey, i'd really appreciate some help differentiating this equation: t= (4+x^2)^(1/2) /3 + (3-x)/5 so that's four plus x to the power of 2 all to the power of 1/2 all over three plus 3-x divided by five... :P Thankyou. I would rewrite it as t= (1/3)(4+x^2)^(1/2) + 3/5 -...
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