Transcript Chapter 1 - Conroe High School

College Physics
Alan Giambattista
Betty Richardson
Robert Richardson
4th edition
Chapter 5
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Question 1
An object is in uniform circular motion. Which
of the following statements is true?
A) Velocity = constant
B) Speed = constant
C) Acceleration = constant
Question 2
A CD makes one complete revolution every
tenth of a second. The angular velocity of
point 4 is:
A) the same as for pt 1.
B) twice that of pt 2.
C) half that of pt 2.
D) 1/4 that of pt 1.
E) four times that of pt 1.
Question 3
A CD makes one complete revolution every
tenth of a second. Which has the largest
linear (tangential) velocity?
A) point 1
B) point 2
C) point 3
D) point 4
Question 4
A spider is sitting on a turntable that is rotating at
33 rpm. The acceleration a of the spider is
A) greater the closer the spider is to the
central axis.
B) greater the farther the spider is from the
central axis.
C) nonzero and independent of his location.
D) zero.
Question 5
A boy swings on a tire swing. When is the
tension in the rope the greatest?
A) At the highest point of the swing.
B) Midway between his highest and lowest
points.
C) At the lowest point in the swing.
D) It is constant.
Question 6
A centrifuge is spinning up with a constant
tangential acceleration. The radial
acceleration
A) is independent of the tangential
acceleration.
B) increases.
C) decreases.
Question 7
A ball on a string is being swung around in a
circle with a constant radial acceleration.
The tangential acceleration
A) is independent of the radial acceleration.
B) increases.
C) decreases.
Question 8
A car is going around a banked curve at a high
rate of speed. For the car not to skid, in
which direction does the frictional force act?
A) Up the plane.
B) Down the plane.
C) Directly towards the center of the curve.
Question 9
Mimas orbits Saturn at a distance D.
Enceladus orbits Saturn at a distance 4D.
What is the ratio of the periods of their
orbits?
A) TM/TE = 1/8
B) TM/TE = 1/4
C) TM/TE = 1/2
D) TM/TE = 2
Question 10
Jill swings on a vine 5m long. What is the
tension in the vine if Jill, mass 60 kg, is
moving at 2.5 m/s when the vine is vertical?
A) 514 N
B) 589 N
C) 664 N
D) 75 N
Question 11
A car goes over a bump of radius 35m. If the
driver's mass is 67 kg, what is the speed the
car must be going in order for the driver to
feel "weightless"?
A) 24 m/s
B) 19 m/s
C) 13 m/s
D) 6 m/s
Question 12
A plane is flying in a vertical circle of radius 210
m. If the pilot's mass is 67 kg, what is the
speed the plane must have in order for the
pilot to experience a force of "2 G's" at the
bottom of the circle?
A) 45 m/s
B) 2100 m/s
C) 21 m/s
D) 4.6 m/s
Question 13
As you make a right-hand turn in your car, you
are pushed against the door to your left.
This is because
A) the centrifugal force pushed you to the
left.
B) no force pushed you to the right.
Question 14
A ball is rolling around a curved horizontal
track. Which of the paths represents the
path of the ball when it leaves the track?
A)
B)
C)
Question 15
The figure below shows a wheel rolling along a
level surface without slipping. Which point
on the wheel has the greatest velocity?
A
A) point A
w
B) point B
B
C) point C
v
D) they all have the
C
same velocity.
Question 16
A child runs around the circular ledge of a
fountain which has a diameter of 6.5 m.
After the child has run 9.8 m, her angular
displacement is
A) 0.48 rad.
B) 6.0 rad.
C) 1.5 rad.
D) 3.0 rad.
Question 17
A child runs around the circular ledge of a
fountain which has a diameter of 6.5 m. If it
takes her 72 seconds to run all the way
around, her angular velocity is
A) 0.087 rad/s
B) 0.57 m/s
C) 0.17 rad/s
D) 0.044 rad/s
Question 18
In Olympic bobsled races, the sleds travel
down the mountain at speeds up to 90 mph
in ice coated tracks, navigating several
sharp turns. If the bobsled is going too fast
around a turn, it
A) travels up the wall on the outside of the
turn.
B) remains in the middle of the track.
C) travels up the wall on the inside of the
turn.
Question 19
A properly banked curve tilts _________ the
center of the turn to increase _________ .
A) towards, the force of kinetic friction.
B) towards, the normal force.
C) away from, the normal force.
D) away from, the force of static friction.
Question 20
Satellite A and satellite B are orbiting the earth.
Satellite B is four times as far away as
satellite A. Compare the linear speeds of the
two satellites.
A) vA = 4vB
B) vA = 2vB
C) vA = ½ vB
D) vA = ¼vB
Answer Key – Chapter 5
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B
A
D
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C
B
A
B
A
C
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B
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B
B
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D
A
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B