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mkwok
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Homework Statement
A sky diver of mass 83.0 kg jumps from a slow-moving aircraft and reaches a terminal speed of 46.0 m/s.
(a) What is the acceleration of the sky diver when her speed is 30.0 m/s?
Homework Equations
R=-bv
mg-bv=ma
The Attempt at a Solution
since R is the resistance force acting on the sky diver: R=mg
therefore I set:
83*9.8 = -b(46),
and solve for b, b = -17.683
then plug the same numbers back into mg-bv=ma to solve for the acceleration at 30m/s
(83)(9.8)-(17.683)(30)=(83)a
a = 3.41m/s^2
but this is not correct, can someone please tell me what i did wrong?