What speed keeps the cylinder at rest problem
A puck of mass m = 1.00 kg slides in a circle of radius r = 23.0 cm on a frictionless table while attached to a hanging cylinder of mass M = 3.80 kg by a cord through a hole in the table. What speed (in m/s) keeps the cylinder at rest?
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Four balls, each of mass m, are connected by four identical relaxed springs with spring constant k. The balls are simulataneously given equal initial speeds v directed away from the center of symmetry of the system.
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Two planes leave the same airport at the same time. One flies at at 20 degrees east of north at 500 miles per hour. How far apart are the planes after 2 hours?
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