PHYS 2305|110 Review Questions With Answers|2025 |63 Pages
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Course
PHYS 2305
Institution
PHYS 2305
Suppose you are compressing a gas with a piston. Both the gas cylinder and piston are heavily insulated. In Stop to Think 19.4 (p. 525), which first-law bar chart describes this process?
a) Chart A
b) Chart B
c) Chart C
d) Chart D - ️️a) Chart A
You and your classmates are asked to conside...
Suppose you are compressing a gas with a piston.
Both the gas cylinder and piston are heavily insulated.
In Stop to Think 19.4 (p. 525), which first-law bar chart
describes this process?
a) Chart A
b) Chart B
c) Chart C
d) Chart D - ✔ ✔ a) Chart A
You and your classmates are asked to consider what
would happen to you if Earth's gravity was suddenly
turned off. One of your classmates says that you
would be pushed off Earth into space by the
centrifugal force exerted on you by Earth's rotation.
Do you agree with your classmate?
a) Yes
,b) No. A centrifugal force is not acting on you. Since
there is no identifiable agent for centrifugal force,
centrifugal force is not a real force.
c) No. The centrifugal force caused by Earth's rotation
would cause you to keep rotating with the Earth
d) No. The reason you would fly off into space is
because of your inertia. Without gravity, there would
be no net force toward the center of the Earth to keep
rotating with the earth. Hence, you would start moving
in a straight line and travel into space.
e) Both B and D are both correct responses to your
classmate. - ✔ ✔ e) Both B and D are both correct
responses to your classmate.
Suppose you are driving a car and you're approaching
a curve in the road. This curve is banked; however,
this banked curve is covered in ice, making the road
approximately frictionless. Will you be able to make
the turn without slipping up or down the bank?
,a) No. To make the turn, you need friction between the
car's tires and the road
b) Yes, but only at speeds between 0 m/s and a critical
speed
c) Yes, but only at one critical speed
d) Yes. During the turn, a normal force is acting on the
car, so you can make the turn at any speed - ✔ ✔
c) Yes, but only at one critical speed
Suppose you drop a book. As the book is falling to the
ground, which of the following statements is true?
a) The magnitude of the force that the Earth exerts on
the book is larger than the magnitude of the force that
the book exerts on the Earth
b) Because the book is in free fall, there is no force
between the Earth and book.
c) The magnitude of the force that the Earth exerts on
the book is the same as the magnitude of the force
that the book exerts on the Earth
, d) The magnitude of the force that the Earth exerts on
the book is smaller than the magnitude of the force
that the book exerts on the Earth - ✔ ✔ c) The
magnitude of the force that the Earth exerts on the
book is the same as the magnitude of the force that
the book exerts on the Earth
Suppose you place a scale, such as the one shown in
Figure 6.9 (p. 139), on the floor of an elevator. When
the elevator is not moving, you place an object on the
scale and the scale reads 1 N. If the elevator starts to
accelerate upwards, how will the reading on the scale
change?
a) The scale reading decreases
b) The scale reading stays the same
c) The scale reading increases - ✔ ✔
Suppose you toss a ball up in the air. As the ball is
traveling through the air, forces act on the ball. In the
absence of air resistance, what are the agent(s) of the
force(s) acting on the ball? Pay attention to the
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