Ch4

1
Chapter 4
2
Two forces are exerted on an object. What third
force would make the net force point to the left?
(1) (2) (3) (4)
3
Two forces are exerted on an object. What third
force would make the net force point to the left?
(1) (2)
(3)
(4)
4
Youve just kicked a rock, and it is now sliding
across the ground about 2 meters in front of you.
Which of these forces act on the ball?
1) Gravity, acting downward. 2) The normal force,
acting upward. 3) The force of the kick, acting
in the direction of motion. 4) Friction, acting
opposite the direction of motion. 5) 1, 2 and 4
but not 3.
5
Youve just kicked a rock, and it is now sliding
across the ground about 2 meters in front of you.
Which of these forces act on the ball?
1) Gravity, acting downward. 2) The normal force,
acting upward. 3) The force of the kick, acting
in the direction of motion. 4) Friction, acting
opposite the direction of motion. 5) 1, 2 and 4
but not 3.
6
Two rubber bands stretched the standard distance
cause an object to accelerate at 2 m/s2. Suppose
another object with twice the mass is pulled by
four rubber bands stretched the standard length.
The acceleration of this second object is
1) 1 m/s2 . 2) 2 m/s2 . 3) 4 m/s2 . 4) 8 m/s2
. 5) 16 m/s2 .
7
Two rubber bands stretched the standard distance
cause an object to accelerate at 2 m/s2. Suppose
another object with twice the mass is pulled by
four rubber bands stretched the standard length.
The acceleration of this second object is
1) 1 m/s2 . 2) 2 m/s2 . 3) 4 m/s2 . 4) 8 m/s2
. 5) 16 m/s2 .
8
Three forces act on an object. In which direction
does the object accelerate?
(1) (2) (3) (4) (5)
9
Three forces act on an object. In which direction
does the object accelerate?
(1) (2) (3)
(4)
(5)
10
An elevator suspended by a cable is moving upward
and slowing to a stop. Which free-body diagram is
correct?
(1) (2) (3) (4) (5)
11
An elevator suspended by a cable is moving upward
and slowing to a stop. Which free-body diagram is
correct?
(1) (2)
(4) (5)
(3)
12
Chapter 4 Reading Quiz
13
What is a net force?
1) The weight excluding the container 2) The
vector sum of all forces in a problem 3) The
vector sum of all forces acting on an
object 4) The vector force applied by a
net 5) The vector sum of all forces that add up
to zero
14
What is a net force?
1) The weight excluding the container 2) The
vector sum of all forces in a problem 3) The
vector sum of all forces acting on an
object 4) The vector force applied by a
net 5) The vector sum of all forces that add up
to zero
15
Which of the following are steps used to identify
the forces acting on an object?
1) Draw a closed curve around the
system 2) Identify the system and the
environment 3) Draw a picture of the
situation 4) All of the above 5) None of the above
16
Which of the following are steps used to identify
the forces acting on an object?
1) Draw a closed curve around the
system 2) Identify the system and the
environment 3) Draw a picture of the
situation 4) All of the above 5) None of the above
17
Which of these is not a force discussed in this
chapter?
1) The tension force 2) The orthogonal
force 3) The normal force 4) The thrust
force 5) None of the above
18
Which of these is not a force discussed in this
chapter?
1) The tension force 2) The orthogonal
force 3) The normal force 4) The thrust
force 5) None of the above
19
Newtons third law
1) is another name for the law of
inertia. 2) says that the velocity of an object
is determined by the net force on the
object. 3) says that every action has an equal
and opposite reaction. 4) was not discussed in
this chapter.
20
Newtons third law
1) is another name for the law of
inertia. 2) says that the velocity of an object
is determined by the net force on the
object. 3) says that every action has an equal
and opposite reaction. 4) was not discussed in
this chapter.