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i got sqrt(2)pi but it's incorrect need help finding y'(0) on part D.

i got sqrt(2)pi but it's incorrect need help finding y'(0) on part D.

Trigonometry (MindTap Course List)
Trigonometry (MindTap Course List)
8th Edition
ISBN:9781305652224
Author:Charles P. McKeague, Mark D. Turner
Publisher:Charles P. McKeague, Mark D. Turner
Chapter3: Radian Measure
Section3.5: Velocities
Problem 44PS: Velocity at the Equator Assuming the radius of the earth is 4,000 miles, use the information from...
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i got sqrt(2)pi but it's incorrect need help finding y'(0) on part D.

The graph shows the displacement from equilibrium of a mass-spring system as a function of time after the vertically hanging system was set in motion at time t = 0. Assume that the units of time are seconds, and the units of displacement are centimeters. The first t-intercept is (0.25, 0) and the first minimum has coordinates (0.75, –3). (a) What is the period T of the periodic motion? T = 2 seconds (b) What is the frequency f in Hertz? What is the angular frequency w in radians / second? f = 1/2 Hertz W = 2pi/2 radians / second (c) Determine the amplitude A and the phase angle y (in radians), and express the displacement in the form y(t) = A cos(wt – y), with y in meters. y(t) .03cos(2pi/2(t+2.25)) meters (d) With what initial displacement y(0) and initial velocity y'(0) was the system set into motion? y(0) .03cos(2pi/2(2.2: H meters y'(0) meters / second
Transcribed Image Text:The graph shows the displacement from equilibrium of a mass-spring system as a function of time after the vertically hanging system was set in motion at time t = 0. Assume that the units of time are seconds, and the units of displacement are centimeters. The first t-intercept is (0.25, 0) and the first minimum has coordinates (0.75, –3). (a) What is the period T of the periodic motion? T = 2 seconds (b) What is the frequency f in Hertz? What is the angular frequency w in radians / second? f = 1/2 Hertz W = 2pi/2 radians / second (c) Determine the amplitude A and the phase angle y (in radians), and express the displacement in the form y(t) = A cos(wt – y), with y in meters. y(t) .03cos(2pi/2(t+2.25)) meters (d) With what initial displacement y(0) and initial velocity y'(0) was the system set into motion? y(0) .03cos(2pi/2(2.2: H meters y'(0) meters / second
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