Determine the minimum downward force to pull up the block. The block weighs W kN. The frictional coefficient between the block and the incline plane is H. The frictional coefficient between the pulley and cable u2. W= 300 + 9b –2c 4 = 0.1+0.01e Hz = 0.05+ 0.01d 120° 30° P

Determine the minimum downward force to pull up the block. The block weighs W kN. The frictional coefficient between the block and the incline plane is H. The frictional coefficient between the pulley and cable u2. W= 300 + 9b –2c 4 = 0.1+0.01e Hz = 0.05+ 0.01d 120° 30° P

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Properties of Aluminium

Aluminum (or Aluminum) is a silvery-white in color metal. The chemical symbol of aluminum is Al and it has an atomic number (Z) of 13 in the periodic table. The aluminum name for this metal is derived from the Latin word ‘alumen’, which means bitter salt. Aluminum was discovered in the year 1825 by Hans Oersted, and later Friedrich Wöhler isolated aluminum. It is the most commonly found metal in the earth’s core, which is around 8% of the total core mass. Moreover, it is the third most commonly found element on earth after oxygen and silicon. Electron distribution of aluminum per shell is 2, 8, and 3 with a valency of 3. Atomic weight is nearly 26.9815 u.

Question

A = 1

B = 2

C = 3

D = 4

E = 5

Determine the minimum downward force to pull up the block.
The block weighs W KN.
The frictional coefficient between the block and the incline plane is H.
The frictional coefficient between the pulley and cable µz:
W= 300 + 9b - 2c
H = 0.1+0.01e
H2 = 0.05 + 0.01d
120°
30°

Expert Solution

Step 1

Given:

a=1 ,b=2 ,c=3 ,d=4 ,e=5

Weight of the block = W = 300+9b-2c = 312N

Co-efficient of friction between block and cable = 0.1+0.01e = 0.15

Co-efficient of friction between cable and pulley = 0.05+0.01d = 0.09

To Find: Minimum downward force to pull up the block

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