I have an idea but I can't get B.

Sigchi4life
Category:
Physics
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Question description

Two firecrackers explode simultaneously 215 m apart along a railroad track, which we can take to define the x axis of an inertial reference frame (the Home Frame). A train (which defines the Other Frame) moves at a constant 30 m/s in the +x direction relative to the track frame.

(a) According to the galilean transformation equations, do the firecrackers explode at the same time?  

(b) How far apart are the explosions as measured in the train frame? (Hint: If formula67.mml what is formula73.mml)   m

(c) Assume that instead of the explosions being simultaneous, the firecracker farther ahead in the +x direction explodes 5.0 s before the other.  Now how far apart would the explosions be as measured in the train frame?   m

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