The cylinder with mass, m = 30 kg, and 400 mm diameter rests against the surfaces as shown in the figure. Assume that the coefficient of static friction is m,= 0.25. Determine the minimum value of the moment, M, to apply so to make the cylinder slip.

The cylinder with mass, m = 30 kg, and 400 mm diameter rests against the surfaces as shown in the figure. Assume that the coefficient of static friction is m,= 0.25. Determine the minimum value of the moment, M, to apply so to make the cylinder slip.

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.49P

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Question

could you please help me with these two subquestions

The cylinder with mass, m = 30 kg, and 400 mm diameter rests against the surfaces as shown in the figure.
Assume that the coefficient of static friction is m,= 0.25.
Determine the minimum value of the moment, M, to apply so to make the cylinder slip.
M
30°

The 50-kg box has an initial speed of 7 m/s along the floor. The coefficient of kinetic friction is
0.40.
Calculate the time required for the box to stop and the maximum distance r covered by the box.
vo = 7 m/s
50 kg
Hk = 0.40

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