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Initially, a 4-lb ball Bis traveling around in a circle of radius Ti = 3 ft with a speed (vg), = 7.0 ft/s. At some moment the attached cord is pulled down through the hole with a constant speed v, = 2.8 ft/s. (Figure 1)

Initially, a 4-lb ball Bis traveling around in a circle of radius Ti = 3 ft with a speed (vg), = 7.0 ft/s. At some moment the attached cord is pulled down through the hole with a constant speed v, = 2.8 ft/s. (Figure 1)

Elements Of Electromagnetics
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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I Review Initially, a 4-lb ball B is traveling around in a circle of radius ri = 3 ft with a speed (vB), = 7.0 ft/s. At some moment the attached cord is pulled down through the hole with a constant speed v, = 2.8 ft/s. (Figure 1) Part A Determine the ball's speed at the instant r2 = 2 ft. Neglect friction and the size of the ball. Express your answer to three significant figures and include the appropriate units. ? (vB)2 = Value Units Submit Request Answer Part B How much work has to be done to pull down the cord at the instant r2 = 2 ft? Neglect friction and the size of the ball. Express your answer to three significant figures and include the appropriate units. ? Figure 1 of 1 > W = Value Units Submit Request Answer B n = 3 ft < Return to Assignment Provide Feedback (VB)1
Transcribed Image Text:I Review Initially, a 4-lb ball B is traveling around in a circle of radius ri = 3 ft with a speed (vB), = 7.0 ft/s. At some moment the attached cord is pulled down through the hole with a constant speed v, = 2.8 ft/s. (Figure 1) Part A Determine the ball's speed at the instant r2 = 2 ft. Neglect friction and the size of the ball. Express your answer to three significant figures and include the appropriate units. ? (vB)2 = Value Units Submit Request Answer Part B How much work has to be done to pull down the cord at the instant r2 = 2 ft? Neglect friction and the size of the ball. Express your answer to three significant figures and include the appropriate units. ? Figure 1 of 1 > W = Value Units Submit Request Answer B n = 3 ft < Return to Assignment Provide Feedback (VB)1
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