lai (yl8859) – HW06 – Ross – (15200)
1
This
printout
should
have
11
questions.
Multiplechoice questions may continue on
the next column or page – find all choices
before answering.
001
(part 1 of 3) 10.0 points
A boat moves through the water with two
forces acting on it. One is a 2140 N forward
push by the motor on the propeller, and the
other is an 1879 N resistive force due to the
water around the bow.
What is the acceleration of the 1111 kg
boat?
Answer in units of m
/
s
2
.
002
(part 2 of 3) 10.0 points
If it starts from rest, how far will it move in
18 s?
Answer in units of m.
003
(part 3 of 3) 10.0 points
What will its velocity be at the end of this
time interval?
Answer in units of m
/
s.
004
(part 1 of 3) 10.0 points
Two forces, 417 N at 11
◦
and 344 N at 32
◦
are
applied to a car in an effort to accelerate it.
3451 kg
417 N
11
◦
344 N
32
◦
What is the magnitude of the resultant of
these two forces?
Answer in units of N.
005
(part 2 of 3) 10.0 points
Find the direction of the resultant force (in re
lation to forward, with counterclockwise con
sidered positive).
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 Winter '08
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 Physics, mechanics, Acceleration, Force, General Relativity

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