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Q1. Determine the displacement of a simple harmonic wave of amplitude 9.60 m at t = 0.71 s. Assume that the wave number is 2.34 m -1, the angular frequency is 2.88 rad/s, and that the wave is propagating in the + x direction at x = 1.21 m.
{Hint: y = Asin (k x - ω t) , and inside the angle bracket has a unit of radian here.}
a. 1.56 mb. 3.36 mc. 5.28 md. 6.78 me. 9.47 m
Q2. A 75-kg person sits on a 3.7-kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.5 cm in diameter. Find out the pressure exerted on the floor by each leg of the chair; assume the weight is evenly distributed.
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