1. Blocks B has a mass of 20 kg and block C has a mass of 15 kg. The coefficient of static friction at the contacting surfaces is 0.2. Block A is suspended by a rope that passes over a fixed cylinder and is attached to block B. The coefficient of static friction between the rope and the cylinder is 0.25. What is the largest mass block A can have without causing block B to slip the left?

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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MODULE 5 E...
MODULE 5
Friction
ELABORATE
The following problems are given to assess your ability to solve problems involving friction.
Instructions. Solve the following problems, refer to your Assignment Guide on the specific
guidelines on formats and how to submit your solution.
1. Blocks B has a mass of 20 kg and block C has a mass of
15 kg. The coefficient of static friction at the contacting
surfaces is 0.2. Block A is suspended by a rope that
passes over a fixed cylinder and is attached to block B.
The coefficient of static friction between the rope and
the cylinder is 0.25. What is the largest mass block A can
have without causing block B to slip the left?
20°
13 ст
50 cm
2. The disk weighs 220 N and the bar weighs 110 N. The
coefficients of friction between the disk and the
inclined surface are us = 0.6 and Hk =0.5. What is the
largest couple M that can be applied to the stationary
disk without causing it to start rotating?
30
3.
A lightweight rope is wrapped around a 1780-N
drum, passes over a frictionless pulley, and is attached to
a weight W (see figure). The coefficient of friction between
the drum and the surfaces is 0.50. Determine the maximum
amount of weight that can be supported by this
arrangement.
|10 cm | 10 cm
20 cm-
4. The weight of the box is W = 90 N and the
coefficient of static friction between the box and
the floor is p=0.65. Neglect the weights of the
bars. What is the largest value of the force F that
will not cause the box to slip?
A
20 cm
berty of and for the exclusive use of SLU. Reproduction, storing in a retrieval system, distrībuting, uploading or posting online, ar transmiting in any form or by any means,
tronic, mechanical, photocopying, recording, or otherwise of any part of this document, without the prior written permission of SLU, is strictly prohibited.
Transcribed Image Text:17% 1:06 PM MODULE 5 E... MODULE 5 Friction ELABORATE The following problems are given to assess your ability to solve problems involving friction. Instructions. Solve the following problems, refer to your Assignment Guide on the specific guidelines on formats and how to submit your solution. 1. Blocks B has a mass of 20 kg and block C has a mass of 15 kg. The coefficient of static friction at the contacting surfaces is 0.2. Block A is suspended by a rope that passes over a fixed cylinder and is attached to block B. The coefficient of static friction between the rope and the cylinder is 0.25. What is the largest mass block A can have without causing block B to slip the left? 20° 13 ст 50 cm 2. The disk weighs 220 N and the bar weighs 110 N. The coefficients of friction between the disk and the inclined surface are us = 0.6 and Hk =0.5. What is the largest couple M that can be applied to the stationary disk without causing it to start rotating? 30 3. A lightweight rope is wrapped around a 1780-N drum, passes over a frictionless pulley, and is attached to a weight W (see figure). The coefficient of friction between the drum and the surfaces is 0.50. Determine the maximum amount of weight that can be supported by this arrangement. |10 cm | 10 cm 20 cm- 4. The weight of the box is W = 90 N and the coefficient of static friction between the box and the floor is p=0.65. Neglect the weights of the bars. What is the largest value of the force F that will not cause the box to slip? A 20 cm berty of and for the exclusive use of SLU. Reproduction, storing in a retrieval system, distrībuting, uploading or posting online, ar transmiting in any form or by any means, tronic, mechanical, photocopying, recording, or otherwise of any part of this document, without the prior written permission of SLU, is strictly prohibited.
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