Transcript A + B

College Physics
Alan Giambattista
Betty Richardson
Robert Richardson
4th edition
Chapter 2
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Question 1
Which is stronger, the earth's pull on the moon,
or the moon's pull on the earth?
A) the earth's pull
B) the moon's pull
C) they're the same
Question 2
A ping-pong ball collides with a bowling ball.
Which experiences the greatest force?
A) The ping-pong ball
B) The bowling ball
C) They experience the same force
D) The force on each depends on its
velocity.
E) The force on each depends on its mass.
Question 3
A book is sitting on a desk top. Identify the 3rd
law partner of the weight of the book.
A) The force of the desk on the book.
B) The force of the book on the desk.
C) The force of the earth on the book.
D) The force of the book on the earth.
Question 4
The space probe Voyager II is leaving the solar
system at a constant velocity. What is the
net force acting on the probe?
A) More than its weight.
B) Equal to its weight.
C) Less than its weight but more than zero.
D) Depends on its speed.
E) Zero.
Question 5
You put your notebook on the front seat of your
car. When your car stops, the notebook
slides off forward. Why?
A) A net force acted on it.
B) No net force acted on it.
C) It remained at rest.
D) It didn't move, but only seemed to.
E) Gravity briefly stopped acting on it.
Question 6
If no force is acting on an object, the object is
A) at rest.
B) slowing down.
C) moving with a constant speed.
D) at rest or moving with a constant speed.
Question 7
A vector F with magnitude 10 makes an
arbitrary angle with respect to the x-axis.
Which of the following is not a possible
value for Fx?
A) Fx = 0
B) Fx = 5
C) Fx = 10
D) Fx = 15
Question 8
You are adding vectors of length 15 units and
35 units. What is the only possible resultant
magnitude that you can obtain out of the
following choices?
A) 0
B) 7
C) 18
D) 37
E) 56
Question 9
Given that A + B = 0, how does the magnitude
of A compare with that of B?
A) equal
B) equal but opposite
Question 10
The space probe Voyager II is leaving the solar
system. What happens to its weight as it
recedes from the sun? What happens to its
mass?
A) increases, stays the same
B) decreases, stays the same
C) decreases, decreases
D) stays the same, decreases
Question 11
What is the magnitude of the vector
F = x + y?
A) 2
B) 1
C) 1.4
Question 12
Two forces are acting on an object.
F1 = 1 N, to the right; F2 = 1 N, up.
What is the direction of the net force?
A) up
B) to the right
C) 45o above the horizontal
D) 45o below the horizontal
Question 13
If the distance to the moon were halved, then
the force of attraction between the earth
and moon would be ______.
A) quartered
B) halved
C) doubled
D) quadrupled
Question 14
The forces acting on a plane are:
lift L = 14 kN up,
weight W = -14 kN down,
thrust T = 1.2 kN east, and
drag D = 0.8 kN west.
What is the net force acting on the plane?
A) 0.4 kN west
B)
0.4 kN east
C) 0.4 kN
D)
0 kN up
Question 15
A parrot that weighs 9 N is sitting on a perch in
a birdcage. What is the force of the perch
acting on the parrot?
A) 0 N
B) 9 N, up
C) 9 N, down
Question 16
Two blocks with the same mass are connected
by a lightweight cord that runs through an
ideal pulley, as shown. When released, the
blocks will end up
A) at their current heights.
B) at the same height.
C) with block 1 on the ground.
D) with block 2 on the ground.
Question 17
A box sitting on a table experiences a normal
force, N. If you push down on the box, the
normal force
A) increases.
B) stays the same.
C) decreases.
Question 18
For which arrangement of boxes is the force of
friction larger? The two boxes are identical.
A) The stacked boxes.
B) The side-by-side boxes.
C) The force is the same.
Question 19
A box of weight 50 N is at rest on a floor where
ms = 0.3. A rope is attached to the box and
pulled horizontally with tension T = 30 N.
Which way does the box move?
A) to the left
B) to the right
C) the box does
not move
Question 20
A box of mass m sits on an inclined plane.
What is the relationship between the weight
of the box, W, and the normal force exerted
on the box, N?
A) W > N
B) W = N
C) W < N
D) can't tell
Answer Key – Chapter 2
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C
C
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B
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D
A
B
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C
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B
B
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A
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A