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A hollow plastic sphere is held below the surface of a freshwater lake by a cord anchored to the bottom of the lake. The sphere has a volume of 0.700 m^3 and the tension in the cord is 900 N .
Part A: Calculate the buoyant force exerted by the water on the sphere.
Part B: What is the mass of the sphere?
Part C: The cord breaks and the sphere rises to the surface. When the sphere comes to rest, what fraction of its volume will be submerged? please show all work.
A boy in a wagon is moving at 3.1 m/s east when another boy begins pulling on the wagon in the direction opposite to its motion at 1.25 m/s^2. (a) How long does it take to give the wagon a velocity of 7.4 m/s west? (b) How far from the starting po..
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