The 1.5-kg collar shown has a coefficient of kinetic friction μ = 0.185 with the shaft. The spring is unstretched when s = 0 and the collar is given an initial velocity of vo 19.8 m/s. The unstretched length of the spring is d = 1.3 m and the spring constant is k = 5.88 N/m. (Figure 1) Figure Vo www www 1 of 1 Part B - The acceleration of the collar after it has moved a certain distance What is the acceleration of the collar after it has moved 7.5 m? Express your answer to three significant figures. ► View Available Hint(s) af = 15. ΑΣΦΑ ↓↑ Uz = vec μA What is the spee of the collar after it has moved 7.5 m? Express your answer to three significant figures and include the appropriate units. ► View Available Hint(s) Value Units Review ? ? m/s²

The 1.5-kg collar shown has a coefficient of kinetic friction μ = 0.185 with the shaft. The spring is unstretched when s = 0 and the collar is given an initial velocity of vo 19.8 m/s. The unstretched length of the spring is d = 1.3 m and the spring constant is k = 5.88 N/m. (Figure 1) Figure Vo www www 1 of 1 Part B - The acceleration of the collar after it has moved a certain distance What is the acceleration of the collar after it has moved 7.5 m? Express your answer to three significant figures. ► View Available Hint(s) af = 15. ΑΣΦΑ ↓↑ Uz = vec μA What is the spee of the collar after it has moved 7.5 m? Express your answer to three significant figures and include the appropriate units. ► View Available Hint(s) Value Units Review ? ? m/s²

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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1. If there is no friction between shaft AB and the collar, what angular velocity θ˙˙ must the mechanism have to keep the collar at r=300 mm from the vertical axis? Express your answer to three significant figures. 2. Consider the same mechanism again, with m=2.95 kg, d=225 mm, k=250 N/m, only now, instead of being smooth, the collar and shaft have a maximum coefficient of friction of μs=0.297. What is the minimum angular velocity required to keep the collar at a constant distance r=300 mm from the axis of rotation? Express your answer to three significant figures.
If there is no friction between shaft AB and the collar, what angular velocity Ö must the mechanism have to keep the collar at r= 660 mm from the vertical axis? Consider the same mechanism again, with m = 3.3 kg, d = 275 mm, k = 180 N/m, only now, instead of being smooth, the collar and shaft have a maximumcoefficient of friction of 0.74. What is the minimum angular velocity required to keep the collar at a constant distance r= 660 mm from the axis of rotation?
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