A 30-kg disk with a radius of 0.7 m ispushed against a spring (k=900N/m). Atthe instant show where the spring isdeformed by 0.2 m, the disk is releasedfrom rest.kAxAssume that the disk will roll withoutsliding after release. The coefficient ofnon-sliding friction between the floor and the disk is 0.3.1. Which of the following kinematic relationships relating the acceleration of the masscenter of the disk a, and its angular acceleration a is correct?a. a, = 0.7ab. 1.4a, = ac. 0.7a, = ad. a,=1.4mama,2. Given the force diagram of thepackage, which of the following isthe most ideally constructeddiagram?lectUwwwBW(0.7) +0.2kg+ma(0.7)²173. Which of the following equationssumming of moments about A iscorrect and can be used to solve forthe angular acceleration of the disk?8W(0.7)+0.2k(0.7) = Iga+ma(0.7)²178CW (0.7) +0.2k(0.7) = fg+ma(0.7)17150.17W (0.7) +02k(0.7)-Ig+ma(0.7)4. What is the total acceleration of the mass center of the disk?5. What is the magnitude and direction of the frictional force between the disk and the floor?LAABma

Given:- mass of disk,m=30 kg,radius of disk,r=.7 m,deformation in spring,x=.2 m,stiffness of…

A 30-kg disk with a radius of 0.7 m is pushed against a spring (k=900N/m). At the instant show where the spring is deformed by 0.2 m, the disk is released from rest. Adx Assume that the disk will roll without sliding after release. The coefficient of non-sliding friction between the floor and the disk is 0.3. 1. Which of the following kinematic relationships relating the acceleration of the mass center of the disk a, and its angular acceleration a is correct? a. a, = 0.7a b. 1.4a, = a c. 0.7a, = a d. a, = 1.4 2. Given the force diagram of the package, which of the following is the most ideally constructed diagram? 8 17W (0.7) +0.2k=fg#t+ma(0.7)² 3. Which of the following equations summing of moments about A is correct and can be used to solve for the angular acceleration of the disk? 8 W(0.7)+0.2k(0.7) = lça + m²(0.7)² 17 8 W(0.7) +0.2k(0.7) = ₂#+m(0.7) 17 15 W(0.7)+02k(87)-Ig+ma(0.7) 17 4. What is the total acceleration of the mass center of the disk? 5. What is the magnitude and direction of the frictional force between the disk and the floor? A B C

A 30-kg disk with a radius of 0.7 m is pushed against a spring (k=900N/m). At the instant show where the spring is deformed by 0.2 m, the disk is released from rest. Adx Assume that the disk will roll without sliding after release. The coefficient of non-sliding friction between the floor and the disk is 0.3. 1. Which of the following kinematic relationships relating the acceleration of the mass center of the disk a, and its angular acceleration a is correct? a. a, = 0.7a b. 1.4a, = a c. 0.7a, = a d. a, = 1.4 2. Given the force diagram of the package, which of the following is the most ideally constructed diagram? 8 17W (0.7) +0.2k=fg#t+ma(0.7)² 3. Which of the following equations summing of moments about A is correct and can be used to solve for the angular acceleration of the disk? 8 W(0.7)+0.2k(0.7) = lça + m²(0.7)² 17 8 W(0.7) +0.2k(0.7) = ₂#+m(0.7) 17 15 W(0.7)+02k(87)-Ig+ma(0.7) 17 4. What is the total acceleration of the mass center of the disk? 5. What is the magnitude and direction of the frictional force between the disk and the floor? A B C

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.48P: Find the smallest distance d for which the hook will remain at rest when acted on by the force P....

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