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williamluffy
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1. an airplanes flies a straight course form A to B and back again. the distance between A and B is L and the airplane mantains a constant airspeed V. there is a steady wind with a speed v.
a. find an expression. for the total trip time for an arbitrary wind direction. Notice that the trip time is always increased by the presence of a wind in any direction.
2. a pendulum of mass m and length L is released from rest in a horizontal position. a nail a distance d below the pivot causes the mass to move along the path indicated by the dotted line. find the minimum distance d in terms of L such that the mass will swing completely round in the circle.
a. find an expression. for the total trip time for an arbitrary wind direction. Notice that the trip time is always increased by the presence of a wind in any direction.
2. a pendulum of mass m and length L is released from rest in a horizontal position. a nail a distance d below the pivot causes the mass to move along the path indicated by the dotted line. find the minimum distance d in terms of L such that the mass will swing completely round in the circle.