(596) Problem 8 Suppose a 14 kg elevator car s lifted a distance 36 mby its cabl

Question

(596) Problem 8 Suppose a 14 kg elevator car s lifted a distance 36 mby its cable at a constant speed, assuming the frictional force on the elevator has a constant value of 105 N. Gil 33% Part (a) Calculate the wo.. ne on the elevator by its cable, in Joules ?? 33% Part (b) Calculate the work done by the gravitational force on the elevator, in joules, during this process 33% Part (c) Calculate the total work done on the elevator, in joules. WnetL Grade Deduct Potentia sino l coso l tand) |--(1-1-7 Submis

Explanation / Answer

a) Fk = 105 N

Fg = me g = 1400 * 9.8 = 13720 N

Fc = 13720 + 105 = 13825 N

Wcable = Fc * d = 13825 * 36

work done by cable = 4.97 * 105 J

b) work done by the gravitational force Wgravita = - Fg * d

= - 13720 * 36

work done by the gravitational force = -4.94 * 105 J

c) Total work done = 0

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