sindt (as53996) – HW 4 – Opyrchal – (11101)
1
This
printout
should
have
12
questions.
Multiplechoice questions may continue on
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001
10.0 points
A person of mass 71
.
3 kg escapes from a burn
ing building by jumping from a window situ
ated 30
.
1 m above a catching net.
The acceleration of gravity is 9
.
8 m
/
s
2
.
If air resistance exerts a force of 115
.
9 N
on him as he falls, determine his speed just
before he hits the net.
Answer in units of m
/
s.
002
(part 1 of 3) 10.0 points
A boat moves through the water with two
forces acting on it. One is a 2251 N forward
push by the motor on the propeller, and the
other is an 2092 N resistive force due to the
water around the bow.
What is the acceleration of the 1271 kg
boat?
Answer in units of m
/
s
2
.
003
(part 2 of 3) 10.0 points
If it starts from rest, how far will it move in
13 s?
Answer in units of m.
004
(part 3 of 3) 10.0 points
What will its velocity be at the end of this
time interval?
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 Spring '09
 WANG
 Physics, Force, Mass, General Relativity

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