Question 1

An object in free fall has

Accepted Answer

A)  a constant speed. 
B)  a constant velocity. 
C)  a velocity that changes 9.8 m/s each second. 
D)  an acceleration that depends on its mass. 
A)  a constant speed. 
B)  a constant velocity. 
C)  a velocity that changes 9.8 m/s each second. 
D)  an acceleration that depends on its mass.

Question 2

The direction of the acceleration of an object moving in a circle at constant speed is

Accepted Answer

A)  changing, but pointing in a predictable direction. 
B)  constant and pointing in only one direction. 
C)  constant and pointing in two directions. 
D)  none of these 
A)  changing, but pointing in a predictable direction. 
B)  constant and pointing in only one direction. 
C)  constant and pointing in two directions. 
D)  none of these

Question 3

A freely falling object

Accepted Answer

A)  has a uniformly increasing velocity. 
B)  is unaffected by gravity. 
C)  has a uniformly increasing acceleration. 
D)  has a uniformly increasing displacement. 
A)  has a uniformly increasing velocity. 
B)  is unaffected by gravity. 
C)  has a uniformly increasing acceleration. 
D)  has a uniformly increasing displacement.

Question 4

As a block slides down a 33° frictionless incline, its acceleration

Accepted Answer

A)  decreases with distance. 
B)  remains constant. 
C)  is greatest at the bottom of the incline. 
D)  is greatest at the top of the incline. 
A)  decreases with distance. 
B)  remains constant. 
C)  is greatest at the bottom of the incline. 
D)  is greatest at the top of the incline.

Question 5

Distance covered per unit of time is called

Accepted Answer

A)  speed. 
B)  acceleration. 
C)  velocity. 
D)  displacement. 
A)  speed. 
B)  acceleration. 
C)  velocity. 
D)  displacement.

Question 6

A car is moving down a freeway in a straight line at a constant rate of 32.0 m/s for 3.0 s. Its acceleration is

Accepted Answer

A)  9.8 m/s2. 
B)  9.8 m/s. 
C)  zero. 
D)  32.0 m/s. 
E)  11.0 m/s2. 
A)  9.8 m/s2. 
B)  9.8 m/s. 
C)  zero. 
D)  32.0 m/s. 
E)  11.0 m/s2.

Question 7

In the equation ac= v2/r for centripetal acceleration, the r stands for

Accepted Answer

A)  diameter. 
B)  distance. 
C)  radius. 
D)  rate. 
A)  diameter. 
B)  distance. 
C)  radius. 
D)  rate.

Question 8

On Earth, the magnitude of the acceleration of a vertical projectile at its maximum height is equal to ______________.

Accepted Answer

The answer of On Earth, the magnitude of the acceleration...

Question 9

On a trip, a family travels 200 km in 2.5 h on the first day, 300 km in 4.0 h on the second day, and 250 km in 3.5 h on the third day. What was the average speed, in kilometers per hour, for the total trip?

Accepted Answer

The answer of On a trip, a family travels 200...

Question 10

A ball dropped from the top of a building hits the ground 9.0 s later. How high is the building (in meters)?

Accepted Answer

400 m (rou

Question 11

Dropped objects on the Moon fall at a slower rate than on Earth because of a smaller ______________.

Accepted Answer

accelerati

Question 12

The distance a dropped object travels is proportional to the ______________ of the time.

Accepted Answer

The answer of The distance a dropped object travels is...

Question 13

The straight-line distance and direction between two points are, together, called ______________.

Accepted Answer

The answer of The straight-line distance and direction between two...

Question 14

A(n) ______________ quantity has only magnitude.

Accepted Answer

The answer of A(n) ______________ quantity has only magnitude....

Question 15

A projectile's horizontal velocity component (ignoring air resistance)

Accepted Answer

A)  does not change. 
B)  changes most rapidly near the bottom of its trajectory. 
C)  changes at a variable rate. 
D)  changes at a constant rate. 
A)  does not change. 
B)  changes most rapidly near the bottom of its trajectory. 
C)  changes at a variable rate. 
D)  changes at a constant rate.

Question 16

If an object moves with constant velocity,

Accepted Answer

A)  its speed is constant. 
B)  its direction is constant. 
C)  its average speed is constant. 
D)  its distance traveled per unit time is constant. 
E)  all of these 
A)  its speed is constant. 
B)  its direction is constant. 
C)  its average speed is constant. 
D)  its distance traveled per unit time is constant. 
E)  all of these

Question 17

The distance traveled by a dropped object in free fall is directly proportional to

Accepted Answer

A)  the time squared. 
B)  its weight. 
C)  its mass. 
D)  none of these. 
A)  the time squared. 
B)  its weight. 
C)  its mass. 
D)  none of these.

Exam 2: Motion

An object in free fall has

The direction of the acceleration of an object moving in a circle at constant speed is

A freely falling object

As a block slides down a 33° frictionless incline, its acceleration

Distance covered per unit of time is called

A car is moving down a freeway in a straight line at a constant rate of 32.0 m/s for 3.0 s. Its acceleration is

In the equation ac= v2/r for centripetal acceleration, the r stands for

On Earth, the magnitude of the acceleration of a vertical projectile at its maximum height is equal to ______________.

On a trip, a family travels 200 km in 2.5 h on the first day, 300 km in 4.0 h on the second day, and 250 km in 3.5 h on the third day. What was the average speed, in kilometers per hour, for the total trip?

A ball dropped from the top of a building hits the ground 9.0 s later. How high is the building (in meters)?

Dropped objects on the Moon fall at a slower rate than on Earth because of a smaller ______________.

The distance a dropped object travels is proportional to the ______________ of the time.

The straight-line distance and direction between two points are, together, called ______________.

A(n) ______________ quantity has only magnitude.

A projectile's horizontal velocity component (ignoring air resistance)

If an object moves with constant velocity,

The distance traveled by a dropped object in free fall is directly proportional to

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In the equation a_c= v²/r for centripetal acceleration, the r stands for