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OpenStudy (anonymous):
An k incline plane has 2 = 40.0º and : = 0.15. Starting from rest, how long will it take a 4.0 kg block to reach a speed of 12 m/s?
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OpenStudy (homeworksucks):
whats 0.15?
OpenStudy (anonymous):
its uk
OpenStudy (homeworksucks):
\[\mu_{k}?\]
OpenStudy (anonymous):
ya
OpenStudy (homeworksucks):
So lets draw a free body diagram first
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OpenStudy (homeworksucks):
|dw:1386551096630:dw|
OpenStudy (homeworksucks):
And find the net force acting in the direction parallel to the incline.
OpenStudy (homeworksucks):
So lets find the component of gravity that acts pulling the block down.
OpenStudy (anonymous):
how do i do that
OpenStudy (homeworksucks):
|dw:1386551347635:dw|
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