Explanation Given information: The diameter of the shaft is d = 2.5 in . . The coefficient of static friction between the shaft and the lever is μ s = 0.15 . Calculation: Find the distance between the center of the shaft to the line of action of reaction ( r f ) using the relation. r f = r sin ϕ s ≈ r μ s Here, the radius of the shaft is r and the coefficient of static friction between the axle and the bearing is μ s . Substitute ( 2.5 2 ) in . for r and 0.15 for μ s . r f = ( 2.5 2 ) × 0.15 = 0.1875 in . Show the free-body diagram of the shaft-lever assembly as in Figure 1

Vector Mechanics for Engineers: Statics and Dynamics

11th Edition

ISBN: 9780073398242

Author: Ferdinand P. Beer, E. Russell Johnston Jr., David Mazurek, Phillip J. Cornwell, Brian Self

Publisher: McGraw-Hill Education

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Chapter 8.3, Problem 8.87P

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Find the force P required to start the lever rotating counter clockwise.

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Chapter 8.3, Problem 8.86P

Chapter 8.3, Problem 8.88P

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Chapter 8 Solutions

Vector Mechanics for Engineers: Statics and Dynamics

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Find the force P required to start the lever rotating counter clockwise.

Solution Summary: The author shows the free-body diagram of the shaft-lever assembly as in Figure 1.

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Find the force P required to start the lever rotating counter clockwise.

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