A train pulls out of a station along a straight horizontal track with five identical freight cars behind it, each of which weighs 90.0 KN. The train reaches a speed of 25.0 m/s within 5.0 mins. of starting out. Assuming the engine pulla with a force constant dur ing this interval, with a magnitude of a force does the coupling between cars pulls forward on the last of the freight cars? Ignore air resistance and friction on the freight cars. a. 733.94N b. 458.72N c. 45, 871.56N d. 2.30KN d. 459 KN
A train pulls out of a station along a straight horizontal track with five identical freight cars behind it, each of which weighs 90.0 KN. The train reaches a speed of 25.0 m/s within 5.0 mins. of starting out. Assuming the engine pulla with a force constant dur ing this interval, with a magnitude of a force does the coupling between cars pulls forward on the last of the freight cars? Ignore air resistance and friction on the freight cars. a. 733.94N b. 458.72N c. 45, 871.56N d. 2.30KN d. 459 KN
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Transcribed Image Text:9. A train pulls out of a station
straight
five
along
horizonta1
a
track
with
identical
freight cars behind it, each of
which weighs 90.0 KN.
reaches a speed
within 5.0 mins. of starting out.
Assuming the engine pulls with a
The train
of
25.0 m/s
force
during
this
constant
interval, with a magnitude of a
force does the coupling between
cars pulls forward on the last
of the freight cars? Ignore air
resistance and
friction on the
freight cars.
a. 733.94N
b. 458.72N
c. 45, 871.56N
d. 2.30KN
d. 459 KN
A ball is thrown vertically
initial velocity of
3m/ sec., from the window of a
tall building. The ball strikes
the sidewalk at the ground level
5 seconds later. Find the height
of the window above the ground
10.
with
level.
a. 66.47m
b. 107.43m
c. 107.89m
d. 66.93m
e. none of the above
Transcribed Image Text:travelling
speed
(approximately 34 miles per hour)
in a zone where the posted speed
is 25 miles per hour.
the motorist passes a stationary
12.
A
car
at
a
constant
of
15m/s
limit
As
police
car,
the
police
accelerate at a constant rate of
3.1 0m/sec.
sg.
and maintains
of acceleration until
this rate
the police car pulls next to the
speeding car. Determine the time
required
for
the officer
to
cat ch
the
speeder
and
the
distance travelled during
cha se.
а. 10sec, 150m
c. 4.46sec, 66.90m
the
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