HOMEWORK PROBLEMS Basic Skills R3B.1 Clock P is at rest alongside a racetrack. A

Question

HOMEWORK PROBLEMS Basic Skills R3B.1 Clock P is at rest alongside a racetrack. A jockey on horseback checks her watch against clock P as she passes it during the first lap (event A) and then checks her watch again as she passes clock P the second time (event B). (a) Which clock (clock P or the watch) measures the space- time interval between events A and B? (b) Which measures proper time? (Be careful!) (c) Do either of the clocks measure coordinate time between the events in the ground frame? Discuss. R3B.2 Alyssa is a passenger on a train moving at a con- stant velocity relative to the ground She synchronizes her

Explanation / Answer

(a.) the watch
(b.) Clock P; the reference frame is the place where the two events are in the same spatial but not temporal location, and the proper time is measured there.
c) No, don't think so; the coordinate time has to be measured by a distant observer.

Thankyou.

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