Solve the Problem 5.31 * 5.31 • You are lowering two boxes, one on top of the other, down the ramp shown in Fig. E5.31 by pulling on a rope parallel to the surface of the ramp. Both boxes move together at a constant speed of 15.0 cm/s. The coefficient of kinetic friction between the and the lower box is 0.444, and the coefficient of static fric- tion between the two boxes is 0.800. (a) What force do you need to exert to accomplish this? (b) What are the magnitude and direction of the friction force on the upper box? ramp Figure E5.31 32.0 kg 48.0 kg 2.50 m 4.75 m
Solve the Problem 5.31 * 5.31 • You are lowering two boxes, one on top of the other, down the ramp shown in Fig. E5.31 by pulling on a rope parallel to the surface of the ramp. Both boxes move together at a constant speed of 15.0 cm/s. The coefficient of kinetic friction between the and the lower box is 0.444, and the coefficient of static fric- tion between the two boxes is 0.800. (a) What force do you need to exert to accomplish this? (b) What are the magnitude and direction of the friction force on the upper box? ramp Figure E5.31 32.0 kg 48.0 kg 2.50 m 4.75 m
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Transcribed Image Text:Solve the Problem 5.31 *
5.31 • You are lowering two boxes, one on top of the other,
down the ramp shown in Fig. E5.31 by pulling on a rope parallel to
the surface of the ramp. Both boxes move together at a constant
speed of 15.0 cm/s. The coefficient of kinetic friction between the
ramp and the lower box is 0.444, and the coefficient of static fric-
tion between the two boxes is 0.800. (a) What force do you need to
exert to accomplish this? (b) What are the magnitude and direction
of the friction force on the upper box?
Figure E5.31
32.0
kg
48.0
kg
2.50 m
4.75 m
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