Unformatted text preview: PHY 3101 Intermediate Modern Physics Hour Exam 1 Feb. 24, 2006 Show all your work with correct units. Name: ('2. g l. (10 pts) Little green men approach the earth in a ﬂying saucegat a speed of 0.79 c. At
the same time, little purple men aproach the earth in a ﬂying cup with a speed of 0.91 C
from exactly the opposite direction. At what Speed do the little green men think the little purple men are approaching them? LAX: ‘0'7/“0'7” p 757 a
f—(vﬂ/cllaﬂﬂj C _____ _/ lb. (10 pts) A little green man measures the length of his flying saucer in the direction of
motion to be 127 m long. How long would an observer on earth think the ﬂying saucer . r) _
IS. I 7); [47,772 : [65/ (372/9523 '/. /‘: 727m
76 1c. (10 pts) A little purple man measures the mass of his ﬂying cup to be 5320 kg. What
would an observer on earth determine the momentum of the ﬂying cup to be? Y : : 324/2.
4/ [,OﬂI;
7 5”,.) _ ~ /)2.
ﬁzb’mu:[7 ”279(53’OK9y‘” 6“) [V00 j ‘ §>Ujééb
'T 1d. (10 pts) What would an observer on earth determine the kinetic energy of the ﬂying
cup to be? 5. :MM: a...)(5;..x.)a../.5;2> 2 g: 7J'x/o) Q ...
View
Full Document
 Fall '09
 PROSPER

Click to edit the document details