7. Four turns of rope around a horizontal post will hold a 200kN weight with a pull of 20 kN. a) Compute the angle of wrap in radians. b) Determine the coefficient of friction between the rope and the post. c) Calculate the force necessary to hold the 2000 kN weight if the coefficient of friction is doubled.

7. Four turns of rope around a horizontal post will hold a 200kN weight with a pull of 20 kN. a) Compute the angle of wrap in radians. b) Determine the coefficient of friction between the rope and the post. c) Calculate the force necessary to hold the 2000 kN weight if the coefficient of friction is doubled.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A crate, which has a weight of W, is placed on an inclination. The force P is applied to prevent the crate from sliding down the inclination. a) Determine the minimum required force P, if the coefficient of static friction is u31. b) Determine the friction force (in magnitude) acting at the bottom of the crate if the force P=P1 and the coefficient of statie friction is µs1. c) Determine the minimum required force P, if the coefficient of static friction is u32. Use W=450 N, a=35°, us1=0.4, Hs2=0.75 and P=115 N. The minimum required force P in N is (if the coefficient of static friction is µs1) (round to the nearest integer): N The magnitude of friction in N is (if the force P-P, and the coefficient of static friction is u1) (round to the nearest integer): N The minimum required force P in N is (if the coefficient of static friction is µs2) (round to the nearest integer): N
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