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Q1. An object undergoing simple harmonic motion has an utmost displacement of 6.2 m at t = 0.0 s. If an angular frequency of oscillation is 1.6 rad/s, what is the object's displacement when t = 3.5 s?

Q2. A wooden raft has a mass of 67 kg. When empty it floats in water (density 1000 kg/m3) with 51 percent of its volume submerged. What mass of sand can be put on the raft without it sinking?

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