HW 014 - hanna (brh687) hk 14 Opyrchal (11105) 1 This...

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Unformatted text preview: hanna (brh687) hk 14 Opyrchal (11105) 1 This print-out should have 5 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points A body oscillates with simple harmonic mo- tion along the x-axis. Its displacement varies with time according to the equation x ( t ) = A sin( t + ) . If A = 5 m, = 3 . 477 rad / s, and = 1 . 0472 rad, what is the acceleration of the body at t = 4 s? Note: The argument of the sine function is in radians rather than degrees. Correct answer:- 41 . 3256 m / s 2 . Explanation: Let : A = 5 m , = 3 . 477 rad / s , = 1 . 0472 rad , and t = 4 s . x = A sin( t + ) v = d x dt = A cos( t + ) a = d v dt =- 2 A sin( t + ) =- 2 A sin( t + ) =- (3 . 477 rad / s) 2 (5 m) sin[(3 . 477 rad / s)(4 s) + 1 . 0472 rad] =- 41 . 3256 m / s 2 . 002 10.0 points Military specifications often call for electronic devices to be able to withstand accelerations...
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HW 014 - hanna (brh687) hk 14 Opyrchal (11105) 1 This...

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