Film loop: "Galilean relativity I", ball dropped from mast of ship,2:55min.

Film Loop: Galilean Relativity:Ball Dropped from mast of ship. Length(min.):2:55 Color: No Sound: No This film is a partial realization of an experiment described by Sagredo in Galileo's Two New Sciences: If it be true that the impetus with which the ship moves remains indelibly impressed in the stone after it is let fall from the mast; and if it be further true that this motion brings to impediment or retardment to the motion directly downwards natural to the stone,then there ought to ensue an effect of a very wondrous nature. Suppose a ship stands still, and the time of the falling of a stone from the mast's round top to the deck is two beats of the pulse.Then afterwards have the ship under sail and let the same stone depart from the same place. According to what has been premised, it shall take the time of two pulses in its fall, in which time the ship will have gone, say, twenty yards. The true motion of the stone will then be a transverse line (i.e., a curved line in the vertical plane), considerably longer than the first straight and perpendicular line, the height of the mast, and yet nevertheless the stone will have passed it in the same time. Increase the ship's velocity as much as you will, the falling stone shall describe its transverse lines still longer and longer and yet shall pass them all in those selfsame two pulses. In the film a ball is dropped three times; the slow-motion factor is 7. Scene 1: The ball is dropped by a sailor from the mast. As in Galileo's discussion, the ball continues to move horizontally with the boat's velocity, and it falls vertically. Scene 2: The ball is tipped off a stationary support as the boat goes by. It has no forward velocity. Scene 3: The sailor picks up the ball and holds it briefly before releasing it. The ship and earth are frames of reference in constant relative motion. Each of the three events can be described as viewed in either frame of reference. The laws of motion apply for all six descriptions. The fact that the laws of motion work for both frames of reference,one moving at constant velocity with respect to the other, is what is meant by Galilean relativity. Scene 1 in the boat frame can be described as follows: "A ball, initially at rest, is released. It accelerates downward at 9.8 m/sec2 and strikes a point directly beneath the starting point." Scene 1 in the earth frame is described differently: "A ball is projected horizontally toward the left; its path is a parabola and it strikes a point below and to the left of the starting point." Describe the following: Scene 2 in boat frame; Scene 2 in earth frame;Scene 3 in boat frame; Scene 3 in earth frame.
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