1)
Please insert A as the answer to the first question.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Solve the problem. Disregard air resistance.
2) A ball is thrown straight upward with a velocity of 39 m/s. How much time passes before the ball strikes the
ground?
A) 2.4 s
B) 8.0 s
C) 4.0 s
D) 1.2
sE
)
1
1
s
3) A package is dropped from a helicopter moving upward at 15 m/s. If it takes 16.0 s before the package strikes
the ground, how high above the ground was the package when it was released?
A) 1200
mB
)
0
m
C) 810 m
D) 1000 m
E) 1500 m
4) At the same moment, one rock is dropped and one is thrown downward with an initial velocity of 10 m/s from
the top of a 300 m building. How much earlier does the thrown rock strike the ground?
A) 0.85 s
B) 0.95 s
C) 0.66 s
D) They land at exactly the same time.
E) The thrown rock lands later.
5) The wheel on a bike has an angular velocity of 54 rad/s when the brakes are appiled and the bike comes to a
rest in 1.5 seconds. How many revolutions does it rotate before stopping?
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 Spring '08
 Brar
 Physics, Resistance, Acceleration, m/s

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