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Unformatted text preview: Name ‘, Physics 31 _ Quiz 2
Closed book, closed notes, no calculators!
Potentially useful information: sin(37°) I 0.6 cos(37°) = 0.8 "l . n I I
You should use 10 mfs‘ as the magnitude of the grnvrtatrono] acceleration.
You should leave answers in terms ofsqum'c roots, if necessary. 1. Two vectors are shown below. Determine the sum A +8 and express it using unit
vector notation. ' ‘ (2 points) A E5i
i #4.; \ GA - 31ft) A
i A“: MiDSingti l +lOCOS J "I «la? m3 M §5‘iﬂ 3“}"3‘ lWVJW‘x b \FQI“ ‘ 2. A baseball is seen to pass upward by a window 40 meters above the street with a vertical
speed of 10 m/s. If the bail was thrown from the street, (3 points) a. what was its initial speed?
b. how much time (aﬂer being seen moving upward past the window) does it reach the
street again? ...
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