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Physics 15200- HW21

# Physics 15200- HW21 - lai(yl8859 HW21 Ross(15200 This...

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lai (yl8859) – HW21 – Ross – (15200) 1 This print-out should have 8 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( ω t + φ ) . If A = 7 m, ω = 3 . 313 rad / s, and φ = 1 . 0472 rad, what is the acceleration of the body at t = 3 s? Note: The argument of the sine function is in radians rather than degrees. Answer in units of m / s 2 . 002 10.0 points A 0 . 325 kg mass is attached to a spring and undergoes simple harmonic motion with a pe- riod of 0 . 56 s. The total energy of the system is 4 . 4 J. Find the amplitude of the motion. Answer in units of m. 003 (part 1 of 4) 10.0 points A 0 . 1 kg block attached to a spring of force constant 9 N / m oscillates with an amplitude of 13 cm. Find the maximum speed of the block. Answer in units of m / s. 004 (part 2 of 4) 10.0 points Find the speed of the block when it is 6 . 5 cm from the equilibrium position.
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