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1. A looptheloop roller coaster ride has a car of mass
m
=80 kg that starts from rest at a height of
h
=30
m above the ground. The car goes down to the ground (point
B
), then up to the top of the loop (point
T
),
and finally to the midpoint (
S
). The radius of the loop is
R
=
h
/3. Neglect friction and the size of the car.
a) Find the speed of the car at the bottom of the loop (point
B
).
24.2 m/s
b) Find the speed of the car at the top of the loop (point
T
).
14.0 m/s
c) Determine the magnitude of the total force on the car when it is at the top of the loop (point
T
).
1570 N
d) Determine the magnitude of the total force on the car when it is at midpoint (
S
) of the loop.
3230 N
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View Full Document2. Fill in the blank with the most appropriate answer to the following questions.
a) Three equal masses A, B, and C are on a horizontal frictionless table. The masses are connected by
strings of negligible mass. If mass C is pulled horizontally by a force of magnitude
F
=27 N, then the
tension in the string between masses B and C is
T
=__18 N___.
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 Spring '08
 Chamberlin
 Physics, Mass

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