2. 1D Motion / Kinematics
Vertical Motion and Free Fall
Multiple Choice
Multiple ChoiceA student throws a set of keys vertically upward to her sorority sister who is in a window 14.00 m above. The second student catches the keys 1.50 s later. (a) With what initial velocity were the keys thrown? (b) What was the velocity of the keys just before they were caught?
A
(a) v0y=37.5 m/s
(b) vy=22.8 m/s
(b) vy=22.8 m/s
B
(a) v0y=16.7 m/s
(b) vy=2 m/s
(b) vy=2 m/s
C
(a) v0y=2 m/s
(b) vy=0 m/s
(b) vy=0 m/s
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