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Friction Tin
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June 30th, 2011 Posted 12:03 am
Tin need help with this problem.?
A student wants to determine the coefficients of static friction and kinetic friction between a box and a plank. She placed the box on the board and gradually elevates one end of the table. When the angle of inclination to the horizontal reaches 30 °, the box begins to slide, and slides 2.4 m for the beam that is in 3.6 s in constant acceleration. (A) What is the coefficient of static friction? (B) What is the coefficient of kinetic friction?
(A) KMG sin30 cos30 = Mg k = tan 30 = 0.577 coefficient of static friction (b) s = (1 / 2) ^ 2 = square root (2s) / t = sqrt (2 * 2.4) / 3.6 = 0,609 m / s ^ 2 a = F / m = (mg sin30 – cos30 KMG) / m = g (0 , 5 to 0.866 k) = 0.609 m / s ^ 2 k = [(0.609 / 9.8) -0.5] / – 0.866 = 0.506 coefficient of kinetic friction
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Tags: film, friction, friction tin car, friction tin toy, friction tinder, robots, tin, tin friction coefficient, toys
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