Question 1

Which one of the arrows below most closely indicates the direction of the bob's acceleration when it is at point 1 ?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E
F) F 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E
F) F

Question 2

Which graph best describes the x-acceleration of the object described in problem N2T.13?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E

Question 3

Two balls have the same size and surface texture, but one is twice as heavy as the other. How many times larger is the terminal speed of the more massive ball falling through air than that of the lighter ball?

Accepted Answer

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

Question 4

The lid of a grand piano is propped open as shown. Which arrow most closely approximates the direction of the force that the hinge exerts on the lid? Assume that the prop exerts a force in parallel to the prop's length. (Hint: Draw a torque diagram of the lid.)
 
A) A
B) B
C) C
D) D
E) E
F) F
T) T

Accepted Answer

The answer of The lid of a grand piano is...

Question 5

An object is discovered near the earth with values of $2 E / m=2.12 \times 107 \mathrm{~m}^{2} / \mathrm{s}^{2}$ and $L / m=7.8 \times 10^{10} \mathrm{~m}^{2} / \mathrm{s}$. This object is in what kind of orbit around the earth?

Accepted Answer

A)  Elliptical 
B)  Parabolic 
C)  Hyperbolic 
A)  Elliptical 
B)  Parabolic 
C)  Hyperbolic

Question 6

Imagine you serve a tennis ball with an initial speed of $10 \mathrm{~m} / \mathrm{s}$ in a direction $10^{\circ}$ below the horizontal. What is its speed at the peak of its trajectory?

Accepted Answer

A)  $10 \mathrm{~m} / \mathrm{s}$ 
B)  $9.8 \mathrm{~m} / \mathrm{s}$ 
C)  $1.7 \mathrm{~m} / \mathrm{s}$ 
D)  $0 \mathrm{~m} / \mathrm{s}$ 
E)  There is no "peak" to this tennis ball's trajectory.
F) Other (specify) 
A)  $10 \mathrm{~m} / \mathrm{s}$ 
B)  $9.8 \mathrm{~m} / \mathrm{s}$ 
C)  $1.7 \mathrm{~m} / \mathrm{s}$ 
D)  $0 \mathrm{~m} / \mathrm{s}$ 
E)  There is no "peak" to this tennis ball's trajectory.
F) Other (specify)

Question 7

An object's x-position is shown in the boxed graph of the following set of graphs. Which of the other graphs in the set most correctly describes its $x$-velocity?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E

Question 8

Do the following statements about the physical world express
-If you push on something, it moves. If you push twice as hard, it moves twice as fast.
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 9

A beetle (black dot on the top view shown below) sits on a rapidly rotating turntable. The table rotates faster and faster, and eventually the beetle loses its grip. What is its subsequent trajectory relative to the ground (assuming it cannot fly)?
 
A) A
B) B
C) B
D) D
E) E
F) F

Accepted Answer

The answer of A beetle (black dot on the top...

Question 10

A person standing in the cabin of a jet plane drops a coin. This coin hits the floor of the cabin at a point directly below where it was dropped (as seen in the cabin) no matter how fast the plane is moving.

Accepted Answer

A) True 
 B)False

Question 11

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 acceleration.

Accepted Answer

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

Question 12

A car is traveling counterclockwise along a circular bend in the road whose effective radius is $100 \mathrm{~m}$. At a certain instant of time, the car is traveling due north, has a speed of $10 \mathrm{~m} / \mathrm{s}$, and is in the process of increasing that speed at a rate of $1 \mathrm{~m} / \mathrm{s}^{2}$. The direction of the car's acceleration at that instant is most nearly
A) North
B) Northeast
C) East
D) Northwest
E) West
F) Southwest
G) Zero

Accepted Answer

The answer of A car is traveling counterclockwise along a...

Question 13

To double the period of a pendulum, you need to multiply its length by a factor of:

Accepted Answer

A)  $\frac{1}{2}$ 
B)  2 
C)  $\sqrt{\frac{1}{2}}$ 
D)  $\sqrt{2}$ 
E)  4
F) Some other result (specify) 
A)  $\frac{1}{2}$ 
B)  2 
C)  $\sqrt{\frac{1}{2}}$ 
D)  $\sqrt{2}$ 
E)  4
F) Some other result (specify)

Question 14

If a car's $x$-position at time $t=0$ is $x(0)=0$ and it has an $x$-velocity of $v_{x}(t)=b(t-T)^{2}$, where $b$ and $T$ are constants, which function below best describes $x(t)$ ?
A) $x(t)=2 b(t-T)$
B) $x(t)=3 b(t-T)^{3}$
C) $x(t)=\frac{1}{3} b(t-T)^{3}$
D) $x(t)=\frac{1}{2} b(t-T)$
E)$x(t)=\frac{1}{3} b\left[(t-T)^{3}+T^{3}\right]$
F) Other (specify)

Accepted Answer

The answer of If a car's $x$-position at time $t=0$...

Question 15

The diagram below shows a top view of the moon's nearly circular orbit around the earth. The moon orbits the earth at a nearly constant speed.
   
At the point shown, use the arrow choices shown to the right to indicate the direction of
-The moon's velocity.

Accepted Answer

The answer of The diagram below shows a top view...

Question 16

Suppose an object is suspended from strings as shown in the diagram below.
  
-Which exerts the smallest force on that ring?
(Hint: Draw a free-body diagram of the ring.)

Accepted Answer

A)  String $A$ 
B)  String B 
C)  String C 
A)  String $A$ 
B)  String B 
C)  String C

Question 17

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 18

We can express the kinetic friction law in the form \(\vec{F}_{K F}=\mu_{k} \vec{F}_{N} .

Accepted Answer

A) True 
 B)False

Question 19

If you double the amplitude of a harmonic oscillator, the object's maximum speed does what?

Accepted Answer

A)  Decreases by a factor of 2 . 
B)  Decreases by a factor of $\sqrt{2}$. 
C)  Does not change. 
D)  Increases by a factor of $\sqrt{2}$. 
E)  Increases by a factor of 2.
F) Changes by some other factor (specify). 
A)  Decreases by a factor of 2 . 
B)  Decreases by a factor of $\sqrt{2}$. 
C)  Does not change. 
D)  Increases by a factor of $\sqrt{2}$. 
E)  Increases by a factor of 2.
F) Changes by some other factor (specify).

Question 20

If you want to stop a car without anti-lock brakes as quickly as possible on an icy road, you should

Accepted Answer

A)  Jam on the brakes as hard as you can. 
B)  Push on the brakes as hard as you can without locking the car's wheels and thus making the car skid. 
C)  Pump the brakes. 
D)  Do something else (specify). 
A)  Jam on the brakes as hard as you can. 
B)  Push on the brakes as hard as you can without locking the car's wheels and thus making the car skid. 
C)  Pump the brakes. 
D)  Do something else (specify).

Which one of the arrows below most closely indicates the direction of the bob's acceleration when it is at point 1 ?

Which graph best describes the x-acceleration of the object described in problem N2T.13?

Two balls have the same size and surface texture, but one is twice as heavy as the other. How many times larger is the terminal speed of the more massive ball falling through air than that of the lighter ball?

The lid of a grand piano is propped open as shown. Which arrow most closely approximates the direction of the force that the hinge exerts on the lid? Assume that the prop exerts a force in parallel to the prop's length. (Hint: Draw a torque diagram of the lid.) A) A B) B C) C D) D E) E F) F T) T

An object is discovered near the earth with values of $2 E / m=2.12 \times 107 \mathrm{~m}^{2} / \mathrm{s}^{2}$ and $L / m=7.8 \times 10^{10} \mathrm{~m}^{2} / \mathrm{s}$ . This object is in what kind of orbit around the earth?

Imagine you serve a tennis ball with an initial speed of $10 \mathrm{~m} / \mathrm{s}$ in a direction $10^{\circ}$ below the horizontal. What is its speed at the peak of its trajectory?

An object's x-position is shown in the boxed graph of the following set of graphs. Which of the other graphs in the set most correctly describes its $x$ -velocity?

Do the following statements about the physical world express -If you push on something, it moves. If you push twice as hard, it moves twice as fast. A)a primarily Aristotelian viewpoint . B)aprimarily Newtonian viewpoint. C)are they consistent with both viewpoints

A beetle (black dot on the top view shown below) sits on a rapidly rotating turntable. The table rotates faster and faster, and eventually the beetle loses its grip. What is its subsequent trajectory relative to the ground (assuming it cannot fly)? A) A B) B C) B D) D E) E F) F

A person standing in the cabin of a jet plane drops a coin. This coin hits the floor of the cabin at a point directly below where it was dropped (as seen in the cabin) no matter how fast the plane is moving.

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 acceleration.

To double the period of a pendulum, you need to multiply its length by a factor of:

The diagram below shows a top view of the moon's nearly circular orbit around the earth. The moon orbits the earth at a nearly constant speed. At the point shown, use the arrow choices shown to the right to indicate the direction of -The moon's velocity.

Suppose an object is suspended from strings as shown in the diagram below. -Which exerts the smallest force on that ring? (Hint: Draw a free-body diagram of the ring.)

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?

We can express the kinetic friction law in the form \(\vec{F}_{K F}=\mu_{k} \vec{F}_{N} .

If you double the amplitude of a harmonic oscillator, the object's maximum speed does what?

If you want to stop a car without anti-lock brakes as quickly as possible on an icy road, you should

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

Which one of the arrows below most closely indicates the direction of the bob's acceleration when it is at point 1 ?

Which graph best describes the x-acceleration of the object described in problem N2T.13?

Two balls have the same size and surface texture, but one is twice as heavy as the other. How many times larger is the terminal speed of the more massive ball falling through air than that of the lighter ball?

The lid of a grand piano is propped open as shown. Which arrow most closely approximates the direction of the force that the hinge exerts on the lid? Assume that the prop exerts a force in parallel to the prop's length. (Hint: Draw a torque diagram of the lid.) A) A B) B C) C D) D E) E F) F T) T

Imagine you serve a tennis ball with an initial speed of 10 m/s10 \mathrm{~m} / \mathrm{s}10 m/s in a direction 10∘10^{\circ}10∘ below the horizontal. What is its speed at the peak of its trajectory?

An object's x-position is shown in the boxed graph of the following set of graphs. Which of the other graphs in the set most correctly describes its xxx -velocity?

Do the following statements about the physical world express -If you push on something, it moves. If you push twice as hard, it moves twice as fast. A)a primarily Aristotelian viewpoint . B)aprimarily Newtonian viewpoint. C)are they consistent with both viewpoints

A beetle (black dot on the top view shown below) sits on a rapidly rotating turntable. The table rotates faster and faster, and eventually the beetle loses its grip. What is its subsequent trajectory relative to the ground (assuming it cannot fly)? A) A B) B C) B D) D E) E F) F

A person standing in the cabin of a jet plane drops a coin. This coin hits the floor of the cabin at a point directly below where it was dropped (as seen in the cabin) no matter how fast the plane is moving.

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 acceleration.

To double the period of a pendulum, you need to multiply its length by a factor of:

The diagram below shows a top view of the moon's nearly circular orbit around the earth. The moon orbits the earth at a nearly constant speed. At the point shown, use the arrow choices shown to the right to indicate the direction of -The moon's velocity.

Suppose an object is suspended from strings as shown in the diagram below. -Which exerts the smallest force on that ring? (Hint: Draw a free-body diagram of the ring.)

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?

We can express the kinetic friction law in the form \(\vec{F}_{K F}=\mu_{k} \vec{F}_{N} .

If you double the amplitude of a harmonic oscillator, the object's maximum speed does what?

If you want to stop a car without anti-lock brakes as quickly as possible on an icy road, you should

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

Imagine you serve a tennis ball with an initial speed of $10 \mathrm{~m} / \mathrm{s}$ in a direction $10^{\circ}$ below the horizontal. What is its speed at the peak of its trajectory?

An object's x-position is shown in the boxed graph of the following set of graphs. Which of the other graphs in the set most correctly describes its $x$ -velocity?