In the figure, a rectangular slab of slate rests on a bedrock surface inclined at angle 0 = 25.8°. The slab has length L = 33.9 m, thickness T = 8.91 m, and width W = 11.9 m, and 1.0 cm³ of it has a mass of 3.2 g. The coefficient of static friction between slab and bedrock is 0.371. (a) Calculate the component of the gravitational force on the slab parallel to the bedrock surface. (b) Calculate the magnitude of the static frictional force on the slab. By comparing (a) and (b), you can see that the slab is in danger of sliding. This is prevented only by chance protrusions of bedrock. (c) To stabilize the slab, bolts are to be driven perpendicular to the bedrock surface (two bolts are shown). If each bolt has a cross-sectional area of 7.96 cm² and will snap under a shearing stress of 3.68 × 108 N/m², what is the minimum number of bolts needed? Assume that the bolts do not affect the normal force. (a) Number (b) Number (c) Number Units Units Units

In the figure, a rectangular slab of slate rests on a bedrock surface inclined at angle 0 = 25.8°. The slab has length L = 33.9 m, thickness T = 8.91 m, and width W = 11.9 m, and 1.0 cm³ of it has a mass of 3.2 g. The coefficient of static friction between slab and bedrock is 0.371. (a) Calculate the component of the gravitational force on the slab parallel to the bedrock surface. (b) Calculate the magnitude of the static frictional force on the slab. By comparing (a) and (b), you can see that the slab is in danger of sliding. This is prevented only by chance protrusions of bedrock. (c) To stabilize the slab, bolts are to be driven perpendicular to the bedrock surface (two bolts are shown). If each bolt has a cross-sectional area of 7.96 cm² and will snap under a shearing stress of 3.68 × 108 N/m², what is the minimum number of bolts needed? Assume that the bolts do not affect the normal force. (a) Number (b) Number (c) Number Units Units Units

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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Concept explainers

Axial Load

When a bar of the uniform cross-section is acted by a load, such that the load acts along the longitudinal axis of the bar, such kinds of loadings are known as axial loadings. In general terms, a load is an external force acting on a component. An axial load acts perpendicular to the geometric cross-section of the component. Based on the direction of the application of the load, an axial load can be tensile or compressive. The analysis of bodies under the action of axial loads is generally studied under the branch of mechanics, known as statics.

Question

In the figure, a rectangular slab of slate rests on a bedrock surface inclined at angle 0 = 25.8°. The slab has length L = 33.9 m, thickness T
= 8.91 m, and width W = 11.9 m, and 1.0 cm³ of it has a mass of 3.2 g. The coefficient of static friction between slab and bedrock is
0.371. (a) Calculate the component of the gravitational force on the slab parallel to the bedrock surface. (b) Calculate the magnitude of
the static frictional force on the slab. By comparing (a) and (b), you can see that the slab is in danger of sliding. This is prevented only by
chance protrusions of bedrock. (c) To stabilize the slab, bolts are to be driven perpendicular to the bedrock surface (two bolts are
shown). If each bolt has a cross-sectional area of 7.96 cm² and will snap under a shearing stress of 3.68 × 108 N/m², what is the
minimum number of bolts needed? Assume that the bolts do not affect the normal force.
(a) Number
(b) Number
(c) Number
Units
Units
Units

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