Question 1

An airplane starts from rest and accelerates at a constant 10.8 m/s2. What is its speed at the end of a 400 m-long runway?

Accepted Answer

A)  37.0 m/s 
B)  93.0 m/s 
C)  65.7 m/s 
D)  4320 m/s 
E)  186 m/s 
A)  37.0 m/s 
B)  93.0 m/s 
C)  65.7 m/s 
D)  4320 m/s 
E)  186 m/s

Question 2

A bat, flying toward the east at 2.0 m/s, emits a shriek that is reflected back to it from a wall that is 20.0 m in front of the bat at the instant the shriek is emitted. Sound travels at 340 m/s in the air. How many milliseconds after emitting the shriek does the bat hear the reflected echo from the wall?

Accepted Answer

The answer of A bat, flying toward the east at...

Question 3

When is the average velocity of an object equal to the instantaneous velocity?

Accepted Answer

A)  only when the velocity is increasing at a constant rate 
B)  only when the velocity is decreasing at a constant rate 
C)  when the velocity is constant 
D)  always 
E)  never 
A)  only when the velocity is increasing at a constant rate 
B)  only when the velocity is decreasing at a constant rate 
C)  when the velocity is constant 
D)  always 
E)  never

Question 4

A child standing on a bridge throws a rock straight down. The rock leaves the child's hand at time t = 0 s. If we take upward as the positive direction, which of the graphs shown below best represents the acceleration of the stone as a function of time?

Accepted Answer

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

Question 5

The motion of a particle is described in the velocity vs. time graph shown in the figure.   Over the nine-second interval shown, we can say that the speed of the particle

Accepted Answer

A)  only increases. 
B)  only decreases. 
C)  increases and then decreases. 
D)  decreases and then increases. 
E)  remains constant. 
A)  only increases. 
B)  only decreases. 
C)  increases and then decreases. 
D)  decreases and then increases. 
E)  remains constant.

Question 6

Assuming equal rates of uniform acceleration in both cases, how much further would you travel if braking from $56 \mathrm { mi } / \mathrm { h }$ to rest than from $28 \mathrm { mi } / \mathrm { h }$ ?

Accepted Answer

A)  4 times farther 
B)  3.2 times farther 
C)  4.8 times farther 
D)  5.2 times farther 
A)  4 times farther 
B)  3.2 times farther 
C)  4.8 times farther 
D)  5.2 times farther

Question 7

If the velocity of an object is zero, then that object cannot be accelerating.

Accepted Answer

A) True 
 B)False

Question 8

A rock is projected upward from the surface of the Moon, at time t = 0 s, with an upward velocity of 30.0 m/s. The acceleration due to gravity at the surface of the Moon is 1.62 m/s2, and the Moon has no atmosphere. The height of the rock when it is descending with a speed of 20.0 m/s is closest to

Accepted Answer

A)  115 m. 
B)  125 m. 
C)  135 m. 
D)  145 m. 
E)  154 m. 
A)  115 m. 
B)  125 m. 
C)  135 m. 
D)  145 m. 
E)  154 m.

Question 9

If, in the figure, you start from the Bakery, travel to the Cafe, and then to the Art Gallery in 2.00 hours, what is your
(a) average speed?
(b) average velocity?

Accepted Answer

(a) 5.25 k

Question 10

An object is moving with constant non-zero velocity in the +x direction. The velocity versus time graph of this object is

Accepted Answer

A)  a horizontal straight line. 
B)  a vertical straight line. 
C)  a straight line making an angle with the time axis. 
D)  a parabolic curve. 
A)  a horizontal straight line. 
B)  a vertical straight line. 
C)  a straight line making an angle with the time axis. 
D)  a parabolic curve.

Question 11

A car is traveling with a constant speed of 30.0 m/s when the driver suddenly applies the brakes, causing the car to slow down with a constant acceleration. The car comes to a stop in a distance of 120 m. What was the acceleration of the car as it slowed down?

Accepted Answer

A)  3.75 m/s2 
B)  4.00 m/s2 
C)  4.25 m/s2 
D)  4.50 m/s2 
E)  4.75 m/s2 
A)  3.75 m/s2 
B)  4.00 m/s2 
C)  4.25 m/s2 
D)  4.50 m/s2 
E)  4.75 m/s2

Question 12

An object is thrown upwards with a speed of 13 m/s. How long does it take to reach a height of 4.0 m above the projection point while descending? Neglect air resistance.

Accepted Answer

A)  0.42 s 
B)  1.2 s 
C)  2.3 s 
D)  3.1 s 
E)  4.2 s 
A)  0.42 s 
B)  1.2 s 
C)  2.3 s 
D)  3.1 s 
E)  4.2 s

Question 13

An auto manufacturer advertises that their car can go "from zero to sixty in eight seconds." This is a description of what characteristic of the car's motion?

Accepted Answer

A)  average speed 
B)  instantaneous speed 
C)  average acceleration 
D)  instantaneous acceleration 
E)  displacement 
A)  average speed 
B)  instantaneous speed 
C)  average acceleration 
D)  instantaneous acceleration 
E)  displacement

Question 14

A package is dropped from a helicopter that is moving upward at $15 \mathrm {~m} / \mathrm { s }$ If it takes $8.0 \mathrm {~s}$ before the package strikes the ground, how high above the ground was the package when it was released? Neglect air resistance.

Accepted Answer

The answer of A package is dropped from a helicopter...

Exam 2: Motion in One Dimension

An airplane starts from rest and accelerates at a constant 10.8 m/s2. What is its speed at the end of a 400 m-long runway?

When is the average velocity of an object equal to the instantaneous velocity?

A child standing on a bridge throws a rock straight down. The rock leaves the child's hand at time t = 0 s. If we take upward as the positive direction, which of the graphs shown below best represents the acceleration of the stone as a function of time?

The motion of a particle is described in the velocity vs. time graph shown in the figure. Over the nine-second interval shown, we can say that the speed of the particle

Assuming equal rates of uniform acceleration in both cases, how much further would you travel if braking from 56mi/h56 \mathrm { mi } / \mathrm { h }56mi/h to rest than from 28mi/h28 \mathrm { mi } / \mathrm { h }28mi/h ?

If the velocity of an object is zero, then that object cannot be accelerating.

A rock is projected upward from the surface of the Moon, at time t = 0 s, with an upward velocity of 30.0 m/s. The acceleration due to gravity at the surface of the Moon is 1.62 m/s2, and the Moon has no atmosphere. The height of the rock when it is descending with a speed of 20.0 m/s is closest to

If, in the figure, you start from the Bakery, travel to the Cafe, and then to the Art Gallery in 2.00 hours, what is your (a) average speed? (b) average velocity?

An object is moving with constant non-zero velocity in the +x direction. The velocity versus time graph of this object is

A car is traveling with a constant speed of 30.0 m/s when the driver suddenly applies the brakes, causing the car to slow down with a constant acceleration. The car comes to a stop in a distance of 120 m. What was the acceleration of the car as it slowed down?

An object is thrown upwards with a speed of 13 m/s. How long does it take to reach a height of 4.0 m above the projection point while descending? Neglect air resistance.

An auto manufacturer advertises that their car can go "from zero to sixty in eight seconds." This is a description of what characteristic of the car's motion?

A package is dropped from a helicopter that is moving upward at 15 m/s15 \mathrm {~m} / \mathrm { s }15 m/s If it takes 8.0 s8.0 \mathrm {~s}8.0 s before the package strikes the ground, how high above the ground was the package when it was released? Neglect air resistance.

Representing Motion

Vectors and Motion in Two Dimensions

Forces and Newtons Laws of Motion

Applying Newtons Laws

Gravity

Rotational Motion

Equilibrium Ad Elasticity

Momentum

Energy and Work

Using Energy

Thermal Properties of Matter

Fluids

Oscillations

Traveling Waves and Sound

Superposition and Standing Waves

Wave Optics

Ray Optics

Optical Instruments

Electric Fields and Forces

Electric Potential

Current and Resistance

Circuits

Magnetic Fields and Forces

EM Induction and Em Waves

AC Electricity

Relativity

Quantum Physics

Atoms and Molecules

Nuclear Physics

Filters

An airplane starts from rest and accelerates at a constant 10.8 m/s². What is its speed at the end of a 400 m-long runway?

Assuming equal rates of uniform acceleration in both cases, how much further would you travel if braking from $56 \mathrm { mi } / \mathrm { h }$ to rest than from $28 \mathrm { mi } / \mathrm { h }$ ?

A package is dropped from a helicopter that is moving upward at $15 \mathrm {~m} / \mathrm { s }$ If it takes $8.0 \mathrm {~s}$ before the package strikes the ground, how high above the ground was the package when it was released? Neglect air resistance.