Question 1

An object's acceleration vector always points in the direction that it is moving.

Accepted Answer

A) True 
 B)False

Question 2

A spring scale typically indicates the magnitude of the tension force exerted on its bottom hook. What will the scale read in each of the cases shown in the diagram? (Hint: Draw a free-body diagram for the scale in each case.)
-

Accepted Answer

A)  $49 \mathrm{~N}$ 
B)  $98 \mathrm{~N}$ 
C)  $196 \mathrm{~N}$ 
D)  Other (specify) 
A)  $49 \mathrm{~N}$ 
B)  $98 \mathrm{~N}$ 
C)  $196 \mathrm{~N}$ 
D)  Other (specify)

Question 3

A $6-\mathrm{kg}$ bowling ball moving at $3 \mathrm{~m} / \mathrm{s}$ collides with a 1.4-kg bowling pin at rest. How do the magnitudes of the forces exerted by the collision on each object compare?

Accepted Answer

A)  The force on the pin is larger than the force on the ball. 
B) The force on the ball is larger than the force on the pin. 
C)  Both objects experience the same magnitude of force. 
D)  The collision exerts no force on the ball. 
E)  There is no way to tell. 
A)  The force on the pin is larger than the force on the ball. 
B) The force on the ball is larger than the force on the pin. 
C)  Both objects experience the same magnitude of force. 
D)  The collision exerts no force on the ball. 
E)  There is no way to tell.

Question 4

Suppose you throw a ball vertically into the air. At the exact instant that the ball reaches its highest position, select from the choices below the most accurate description of
-The ball's instantaneous velocity.

Accepted Answer

A)  Upward 
B)  Downward 
C)  Zero 
D)  Other (specify) 
A)  Upward 
B)  Downward 
C)  Zero 
D)  Other (specify)

Question 5

Kepler's second law implies that as a planet's distance from the sun increases in an elliptical orbit, its orbital speed

Accepted Answer

A)  Increases. 
B)  Decreases. 
C)  Remains the same. 
D)  Changes in a way we cannot determine. 
A)  Increases. 
B)  Decreases. 
C)  Remains the same. 
D)  Changes in a way we cannot determine.

Question 6

A person would like to pull a car out of a ditch. This person ties one end of a chain to the car's bumper and wraps the other end around a tree so that the chain is taut. The person then pulls on the chain perpendicular to its length, as shown in the picture. The magnitude of the force that the chain exerts on the car in this situation is

Accepted Answer

A)  Much smaller than the force the person exerts on the chain. 
B)  About equal to the force the person exerts on the chain. 
C)  Much bigger than the force the person exerts on the chain. 
A)  Much smaller than the force the person exerts on the chain. 
B)  About equal to the force the person exerts on the chain. 
C)  Much bigger than the force the person exerts on the chain.

Question 7

A mass hanging from the end of a spring has a phase rate of $\omega=6.3 \mathrm{~s}^{-1} \approx 1$ cycle/s. Let's define $t=0$ to be when the mass passes $x=0$ going up. If its speed as it passes is $1.0 \mathrm{~m} / \mathrm{s}$, what is its amplitude $A$ ?

Accepted Answer

A)  0 
B)  $\mathbf{0 . 1 6} \mathrm{m}$ 
C)  $1.0 \mathrm{~m}$ 
D)  $6.3 \mathrm{~m}$ 
E)  We are not given enough information to answer.
F) Some other result (specify) 
A)  0 
B)  $\mathbf{0 . 1 6} \mathrm{m}$ 
C)  $1.0 \mathrm{~m}$ 
D)  $6.3 \mathrm{~m}$ 
E)  We are not given enough information to answer.
F) Some other result (specify)

Question 8

Two marbles are rolling along parallel tracks (which may or may not be inclined). A stroboscopic photograph showing a top view of the positions of the marbles at equally spaced instants of time looks like this:
 
At what instant(s) of time do the marbles have the same instantaneous velocity?

Accepted Answer

A)  At time $t_{B}$ 
B)  At time $t_{G}$ 
C)  At both $t_{B}$ and $t_{G}$ 
D)  Some instant between $t_{C}$ and $t_{D}$ 
E)  Some instant between $t_{D}$ and $t_{E}$
F) Roughly time $t_{D}$ 
A)  At time $t_{B}$ 
B)  At time $t_{G}$ 
C)  At both $t_{B}$ and $t_{G}$ 
D)  Some instant between $t_{C}$ and $t_{D}$ 
E)  Some instant between $t_{D}$ and $t_{E}$
F) Roughly time $t_{D}$

Question 9

Do the following statements about the physical world express
-If you push on an object, it moves. After you release it, it gradually comes to rest because friction drains away the force of the initial push.
A)a primarily Aristotelian viewpoint .
B)aprimarily Newtonian viewpoint.
C)are they consistent with both viewpoints

Accepted Answer

The answer of Do the following statements about the physical...

Question 10

A crate sits on the ground. You push as hard as you can on it, but you cannot move it. At any given time when you are pushing, what is the magnitude of the static friction force exerted on the crate by its contact interaction with the ground compared to the magnitude of your push (which is a normal force)? (Hints: What is the crate's acceleration? Draw a free-body diagram.)

Accepted Answer

A)  $\left|\vec{F}_{S F}\right|\left|\vec{F}_{N}\right|$ 
D)  $\left|\vec{F}_{S F}\right|=0$ ! 
E)  We do not have enough information to answer.} 
A)  $\left|\vec{F}_{S F}\right|\left|\vec{F}_{N}\right|$ 
D)  $\left|\vec{F}_{S F}\right|=0$ ! 
E)  We do not have enough information to answer.}

Question 11

Imagine that an external force of $100 \mathrm{~N}$ must be applied to keep a bicycle and rider moving at a constant speed of 12 $\mathrm{mi} / \mathrm{h}$ against opposing air drag. To double the bike's speed to $24 \mathrm{mi} / \mathrm{h}$, we must increase the magnitude of the force exerted on the bike to

Accepted Answer

A)  $141 \mathrm{~N}$ 
B)  $200 \mathrm{~N}$ 
C)  $400 \mathrm{~N}$ 
D)  It depends on the bike's shape and area 
E)  Other (specify) 
A)  $141 \mathrm{~N}$ 
B)  $200 \mathrm{~N}$ 
C)  $400 \mathrm{~N}$ 
D)  It depends on the bike's shape and area 
E)  Other (specify)

Question 12

A large car drags a small trailer in such a way that their common speed increases rapidly. Which tugs harder on the other?

Accepted Answer

A)  The car tugs harder on the trailer than vice versa. 
B)  The trailer tugs harder on the car than vice versa. 
C)  Both tug equally on each other. 
D)  The trailer exerts no force on the car at all. 
E)  There is no way to tell. 
A)  The car tugs harder on the trailer than vice versa. 
B)  The trailer tugs harder on the car than vice versa. 
C)  Both tug equally on each other. 
D)  The trailer exerts no force on the car at all. 
E)  There is no way to tell.

Question 13

Two balls have the same weight and surface texture, but one has twice the diameter of the other. How many times larger is the terminal speed of the smaller ball falling through air than that of the bigger ball?

Accepted Answer

A)  The balls fall with the same speed in air. 
B)  The smaller ball's terminal speed is $[2]^{1 / 2}$ times larger than the other's. 
C)  The smaller ball's terminal speed is 2 times larger than the other's. 
D)  The smaller ball's terminal speed is 4 times larger than the other's. 
E)  The smaller ball's terminal speed is some other multiple of the other's (specify). 
A)  The balls fall with the same speed in air. 
B)  The smaller ball's terminal speed is $[2]^{1 / 2}$ times larger than the other's. 
C)  The smaller ball's terminal speed is 2 times larger than the other's. 
D)  The smaller ball's terminal speed is 4 times larger than the other's. 
E)  The smaller ball's terminal speed is some other multiple of the other's (specify).

Question 14

The relationship $r_{c}\left|\overrightarrow{v_{c}}\right|=r_{f}\left|\overrightarrow{v_{f}}\right|$ for an elliptical orbit follows from the fact that the satellite's velocity is perpendicular to its position vector at the two extreme points and also from

Accepted Answer

A)  Conservation of angular momentum. 
B)  Conservation of energy. 
C)  Conservation of momentum. 
D)  Newton's second law. 
E)  Some other properties of ellipses.
F) (The given relationship is false!) 
A)  Conservation of angular momentum. 
B)  Conservation of energy. 
C)  Conservation of momentum. 
D)  Newton's second law. 
E)  Some other properties of ellipses.
F) (The given relationship is false!)

Question 15

The object described in problem N12T. 2 has an orbital eccentricity of:

Accepted Answer

A)  1.08 
B)  1.81 
C)  0.81 
D)  0.90 
E)  1.35
F) Other (specify) 
A)  1.08 
B)  1.81 
C)  0.81 
D)  0.90 
E)  1.35
F) Other (specify)

Question 16

A cork floats in an inverted jar sitting on a cart, as shown in the left diagram below. If we suddenly accelerate the cart to the right (as shown in the right diagram) what will the cork do:

Accepted Answer

A)  Lean backward 
B)  Remain vertically floating directly above the base 
C)  Lean forward 
D)  Sink 
E)  Explode 
A)  Lean backward 
B)  Remain vertically floating directly above the base 
C)  Lean forward 
D)  Sink 
E)  Explode

Question 17

A boat hits a sandbar and slides some distance before coming to rest. Which of the arrows shown below best represents the direction of the boat's acceleration as it is sliding? (Hint: Draw a motion diagram.)
 
A) A
B) B
C) C
D) D
E) E
F) F
T) Zero

Accepted Answer

The answer of A boat hits a sandbar and slides...

Question 18

When a baseball pitcher throws a curveball, he or she puts top-spin on the ball. This causes the ball to interact with the passing air in such a way as to make the air push the ball downward perpendicular to the ball's velocity. (This causes the ball to dive sharply as it approaches the plate, making it quite difficult to hit.) We would classify this force as a "lift" force on the ball.

Accepted Answer

A) True 
 B)False

Question 19

A bike (shown in a top view in the diagram) travels around a curve with its brakes on, so that it is constantly slowing down. Which of the arrows shown most closely approximates the direction of the bike's acceleration at the instant it is at the position shown? (Hint: Draw a motion diagram.)
 
A) A
B) B
C) C
D) D
E) E
F) F
T) T

Accepted Answer

The answer of A bike (shown in a top view...

Question 20

A car moving at a constant speed travels past a valley in the road, as shown below. Which of the arrows shown most closely approximates the direction of the car's acceleration at the instant it is at the position shown? (Hint: Draw a motion diagram.)
 
A) A
B) B
C) C
D) D
E) E
F) F
T) T

Accepted Answer

The answer of A car moving at a constant speed...

An object's acceleration vector always points in the direction that it is moving.

A spring scale typically indicates the magnitude of the tension force exerted on its bottom hook. What will the scale read in each of the cases shown in the diagram? (Hint: Draw a free-body diagram for the scale in each case.) -

A $6-\mathrm{kg}$ bowling ball moving at $3 \mathrm{~m} / \mathrm{s}$ collides with a 1.4-kg bowling pin at rest. How do the magnitudes of the forces exerted by the collision on each object compare?

Suppose you throw a ball vertically into the air. At the exact instant that the ball reaches its highest position, select from the choices below the most accurate description of -The ball's instantaneous velocity.

Kepler's second law implies that as a planet's distance from the sun increases in an elliptical orbit, its orbital speed

A mass hanging from the end of a spring has a phase rate of $\omega=6.3 \mathrm{~s}^{-1} \approx 1$ cycle/s. Let's define $t=0$ to be when the mass passes $x=0$ going up. If its speed as it passes is $1.0 \mathrm{~m} / \mathrm{s}$ , what is its amplitude $A$ ?

Two marbles are rolling along parallel tracks (which may or may not be inclined). A stroboscopic photograph showing a top view of the positions of the marbles at equally spaced instants of time looks like this: At what instant(s) of time do the marbles have the same instantaneous velocity?

A large car drags a small trailer in such a way that their common speed increases rapidly. Which tugs harder on the other?

Two balls have the same weight and surface texture, but one has twice the diameter of the other. How many times larger is the terminal speed of the smaller ball falling through air than that of the bigger ball?

The relationship $r_{c}\left|\overrightarrow{v_{c}}\right|=r_{f}\left|\overrightarrow{v_{f}}\right|$ for an elliptical orbit follows from the fact that the satellite's velocity is perpendicular to its position vector at the two extreme points and also from

The object described in problem N12T. 2 has an orbital eccentricity of:

A cork floats in an inverted jar sitting on a cart, as shown in the left diagram below. If we suddenly accelerate the cart to the right (as shown in the right diagram) what will the cork do:

A boat hits a sandbar and slides some distance before coming to rest. Which of the arrows shown below best represents the direction of the boat's acceleration as it is sliding? (Hint: Draw a motion diagram.) A) A B) B C) C D) D E) E F) F T) Zero

A car moving at a constant speed travels past a valley in the road, as shown below. Which of the arrows shown most closely approximates the direction of the car's acceleration at the instant it is at the position shown? (Hint: Draw a motion diagram.) A) A B) B C) C D) D E) E F) F T) T

Conservation Laws Constrain Interactions

The Laws of Physics Are Frame-Independent Relativity

Electricity and Magnetism Are Unified

Matter Behaves Like Waves Quantum Physics

Some Processes Are Irreversible Thermal Physics

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Exam 2: The Laws of Physics Are Universal Newtonian Mechanics

An object's acceleration vector always points in the direction that it is moving.

A spring scale typically indicates the magnitude of the tension force exerted on its bottom hook. What will the scale read in each of the cases shown in the diagram? (Hint: Draw a free-body diagram for the scale in each case.) -

A 6−kg6-\mathrm{kg}6−kg bowling ball moving at 3 m/s3 \mathrm{~m} / \mathrm{s}3 m/s collides with a 1.4-kg bowling pin at rest. How do the magnitudes of the forces exerted by the collision on each object compare?

Suppose you throw a ball vertically into the air. At the exact instant that the ball reaches its highest position, select from the choices below the most accurate description of -The ball's instantaneous velocity.

Kepler's second law implies that as a planet's distance from the sun increases in an elliptical orbit, its orbital speed

Two marbles are rolling along parallel tracks (which may or may not be inclined). A stroboscopic photograph showing a top view of the positions of the marbles at equally spaced instants of time looks like this: At what instant(s) of time do the marbles have the same instantaneous velocity?

A large car drags a small trailer in such a way that their common speed increases rapidly. Which tugs harder on the other?

Two balls have the same weight and surface texture, but one has twice the diameter of the other. How many times larger is the terminal speed of the smaller ball falling through air than that of the bigger ball?

The object described in problem N12T. 2 has an orbital eccentricity of:

A cork floats in an inverted jar sitting on a cart, as shown in the left diagram below. If we suddenly accelerate the cart to the right (as shown in the right diagram) what will the cork do:

A boat hits a sandbar and slides some distance before coming to rest. Which of the arrows shown below best represents the direction of the boat's acceleration as it is sliding? (Hint: Draw a motion diagram.) A) A B) B C) C D) D E) E F) F T) Zero

A car moving at a constant speed travels past a valley in the road, as shown below. Which of the arrows shown most closely approximates the direction of the car's acceleration at the instant it is at the position shown? (Hint: Draw a motion diagram.) A) A B) B C) C D) D E) E F) F T) T

Conservation Laws Constrain Interactions

The Laws of Physics Are Frame-Independent Relativity

Electricity and Magnetism Are Unified

Matter Behaves Like Waves Quantum Physics

Some Processes Are Irreversible Thermal Physics

Filters

A $6-\mathrm{kg}$ bowling ball moving at $3 \mathrm{~m} / \mathrm{s}$ collides with a 1.4-kg bowling pin at rest. How do the magnitudes of the forces exerted by the collision on each object compare?