(III) In the old West, a marshal riding on a train traveling 35.0 m/s sees a duel between two men standing on the Earth 55.0 m apart parallel to the train. The marshal’s instruments indicate that in his reference frame the two men fired simultaneously. ( a ) Which of the two men, the first one the train passes (A) or the second one (B) should be arrested for firing the first shot? That is, in the gunfighter’s frame of reference, who fired first? ( b ) How much earlier did he fire? ( c ) Who was struck first?
(III) In the old West, a marshal riding on a train traveling 35.0 m/s sees a duel between two men standing on the Earth 55.0 m apart parallel to the train. The marshal’s instruments indicate that in his reference frame the two men fired simultaneously. ( a ) Which of the two men, the first one the train passes (A) or the second one (B) should be arrested for firing the first shot? That is, in the gunfighter’s frame of reference, who fired first? ( b ) How much earlier did he fire? ( c ) Who was struck first?
(III) In the old West, a marshal riding on a train traveling 35.0 m/s sees a duel between two men standing on the Earth 55.0 m apart parallel to the train. The marshal’s instruments indicate that in his reference frame the two men fired simultaneously. (a) Which of the two men, the first one the train passes (A) or the second one (B) should be arrested for firing the first shot? That is, in the gunfighter’s frame of reference, who fired first? (b) How much earlier did he fire? (c) Who was struck first?
Two events that happen at different positions x1 and x2 but at the same time t1 = t2, as measured in some reference frame, are said to be
Suppose a 0.40 m^2 frame is placed horizontally under a downward vertical rain lines. Assume that the rain strength is B = 1600 drops/m^2. Calculate the flux of rain through the frame.
(a) 320drops.
(b) 640drops.
(c) 0
4. The speed for vehicles is typically given in reference to the
medium it travels on or through. For example, a car with a top
speed of 180 mph is going that speed relative to the ground [in
the "ground frame"], while a ship with a top speed of 30 mph is
going that speed relative to the water [in the "water frame"], and
an airplane with a top speed of 700 mph is going that speed
relative to the air [in the "air frame"]. The velocities of these
1.5km
objects becomes more complicated when the medium they
move through is itself moving, so a plane at top speed subject to
a 100 mph tail wind still travels at 700 mph relative to the air,
but is going 800 mph relative to the ground. Suppose, when
spring arrives, you want to kayak from Bard to the opposite shore of the Hudson, which is 1.5 km
due west if you travel the shortest distance across. Your kayaking speed, relative to the water is
0.5 m/s
(shore frame)
1.0 m/s, but the river is flowing due south at 0.5 m/s relative to the shore.
A)…
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