Alan Giambattista
Betty Richardson
Robert Richardson
4th edition
Chapter 2
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

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

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.

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.

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.

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.

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.

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 F x
?
A) F x
= 0
B) F x
= 5
C) F x
= 10
D) F x
= 15

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

Given that A + B = 0, how does the magnitude of A compare with that of B ?
A) equal
B) equal but opposite

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

What is the magnitude of the vector
F = x + y ?
A) 2
B) 1
C) 1.4

Two forces are acting on an object.
F
1
= 1 N, to the right ; F
2
= 1 N, up .
What is the direction of the net force?
A) up
B) to the right
C) 45 o above the horizontal
D) 45 o below the horizontal

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

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

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

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.

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.

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.

A box of weight 50 N is at rest on a floor where m s
= 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

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

1.
2.
3.
4.
5.
6.
7.
8.
9.
A
10.
B
D
D
C
C
D
E
B
D
11.
C
12.
C
13.
D
14.
B
15.
B
16.
A
17.
A
18.
C
19.
B
20.
A