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Q. A helium-filled balloon is tied to a 3.4 m long, 0.060 kg string. The balloon is spherical with a radius of 0.40 m. When released, it lifts a length h of the string and then remains in equilibrium. Determine the value of h. When deflated, the balloon has a mass of 0.25 kg. (Hint: Only that part of the string above the floor contributes to the load being held up by the balloon.)

Q. A 755N diver drops from a board 10m above the water's surface. Find the diver's speed 5m above the water's surface. Then find the diver's speed just before striking the water.

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