Question 1

If the magnitude of the velocity of an object increases, we may be sure that during the time of this increase,

Accepted Answer

A)  the object is accelerated. 
B)  the acceleration of the object increases. 
C)  the object is moving in a straight path. 
D)  the object is changing direction. 
E)  none of these 
A)  the object is accelerated. 
B)  the acceleration of the object increases. 
C)  the object is moving in a straight path. 
D)  the object is changing direction. 
E)  none of these A

Question 2

Free-fall motion neglects ______________.

Accepted Answer

frictional effects, or air resistance

Question 3

The magnitudes of two horizontal displacements are 4 m and 9 m, respectively. Given that the vectors may be in either the plus or the minus direction, they cannot be added together to give a total displacement of

Accepted Answer

A)  -13 m. 
B)  -5 m. 
C)  5 m. 
D)  13 m. 
E)  4 m. 
A)  -13 m. 
B)  -5 m. 
C)  5 m. 
D)  13 m. 
E)  4 m. E

Question 4

All the following may be represented by vectors except

Accepted Answer

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

Question 5

An object travels in a circle of radius 2.0 m with a constant speed of 4.0 m/s. What is the direction of its acceleration?

Accepted Answer

A)  Toward the center of the circle 
B)  Normal to the plane of the circle 
C)  Insufficient data given for determination 
D)  Tangential to the circle 
E)  None of these 
A)  Toward the center of the circle 
B)  Normal to the plane of the circle 
C)  Insufficient data given for determination 
D)  Tangential to the circle 
E)  None of these

Question 6

An object is dropped from a vertical distance of 25.5 m above the ground, and it takes 2.28 sec to fall that distance. A second identical object to launched from the same height, with a horizontal velocity of 45.9 m/s. How long does the second object take to fall the 25.5 m?

Accepted Answer

A)  More than 2.28 sec 
B)  Almost 2.28 sec. 
C)  Less than 2.28 sec 
D)  Exactly 2.28 sec 
E)  Much less than 2.28 sec 
A)  More than 2.28 sec 
B)  Almost 2.28 sec. 
C)  Less than 2.28 sec 
D)  Exactly 2.28 sec 
E)  Much less than 2.28 sec

Question 7

Which one of the following is not an area of physics?

Accepted Answer

A)  Mechanics 
B)  Optics 
C)  Algebra 
D)  Acoustics 
A)  Mechanics 
B)  Optics 
C)  Algebra 
D)  Acoustics

Question 8

On the Moon, what is the approximate value for the acceleration due to gravity?

Accepted Answer

The answer of On the Moon, what is the approximate...

Question 9

An automobile's acceleration may be changed by using the

Accepted Answer

A)  windshield wipers. 
B)  steering wheel. 
C)  radio. 
D)  horn. 
A)  windshield wipers. 
B)  steering wheel. 
C)  radio. 
D)  horn.

Question 10

An ant on a picnic table travels 30 cm eastward, then 15 cm northward, then 20 cm westward, and finally 15 cm southward. What is the magnitude of its net displacement?

Accepted Answer

The answer of An ant on a picnic table travels...

Question 11

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

Accepted Answer

A)  variable. 
B)  directly proportional to the speed squared. 
C)  directly proportional to the speed. 
D)  directly proportional to the radius of the circle squared. 
A)  variable. 
B)  directly proportional to the speed squared. 
C)  directly proportional to the speed. 
D)  directly proportional to the radius of the circle squared.

Question 12

A golfer hits a ball on a level fairway at an angle of 60° relative to the horizontal, and it lands on the green. Another golfer hits a ball with the same speed but at another angle, and it lands on the green by the other ball. What was the launch angle for the second golfer?

Accepted Answer

A)  30° 
B)  20° 
C)  45° 
D)  40° 
E)  10° 
A)  30° 
B)  20° 
C)  45° 
D)  40° 
E)  10°

Question 13

An object that is moving in a linear path with an acceleration at a right angle to the motion has a(n) ______________ velocity.

Accepted Answer

A)  changing 
B)  increasing 
C)  decreasing 
D)  constant 
A)  changing 
B)  increasing 
C)  decreasing 
D)  constant

Question 14

A(n) ______________ quantity has both magnitude and direction.

Accepted Answer

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

Question 15

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

Accepted Answer

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

Question 16

What two quantities are constant in uniform circular motion? ______________ and ______________

Accepted Answer

radial dis

Question 17

If an object has a constant velocity, then its acceleration is ______________.

Accepted Answer

The answer of If an object has a constant velocity,...

Question 18

A freely falling object has a constant acceleration of 9.8 m/s2. This means that

Accepted Answer

A)  the object's displacement changes by 9.8 m every second squared. 
B)  the object's speed increases by 9.8 m/s each second. 
C)  the object's acceleration increases by 9.8 m/s2 each second. 
D)  the object travels 9.8 m each second. 
A)  the object's displacement changes by 9.8 m every second squared. 
B)  the object's speed increases by 9.8 m/s each second. 
C)  the object's acceleration increases by 9.8 m/s2 each second. 
D)  the object travels 9.8 m each second.

Question 19

Motion necessarily involves

Accepted Answer

A)  a change in velocity. 
B)  a change in speed. 
C)  a change in direction. 
D)  a change in position. 
E)  all of these 
A)  a change in velocity. 
B)  a change in speed. 
C)  a change in direction. 
D)  a change in position. 
E)  all of these

Question 20

A rifle bullet shot horizontally has a vertical acceleration of ______________.

Accepted Answer

9.8 m/s², o

Exam 2: Motion

If the magnitude of the velocity of an object increases, we may be sure that during the time of this increase,

Free-fall motion neglects ______________.

The magnitudes of two horizontal displacements are 4 m and 9 m, respectively. Given that the vectors may be in either the plus or the minus direction, they cannot be added together to give a total displacement of

All the following may be represented by vectors except

An object travels in a circle of radius 2.0 m with a constant speed of 4.0 m/s. What is the direction of its acceleration?

An object is dropped from a vertical distance of 25.5 m above the ground, and it takes 2.28 sec to fall that distance. A second identical object to launched from the same height, with a horizontal velocity of 45.9 m/s. How long does the second object take to fall the 25.5 m?

Which one of the following is not an area of physics?

On the Moon, what is the approximate value for the acceleration due to gravity?

An automobile's acceleration may be changed by using the

An ant on a picnic table travels 30 cm eastward, then 15 cm northward, then 20 cm westward, and finally 15 cm southward. What is the magnitude of its net displacement?

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

A golfer hits a ball on a level fairway at an angle of 60° relative to the horizontal, and it lands on the green. Another golfer hits a ball with the same speed but at another angle, and it lands on the green by the other ball. What was the launch angle for the second golfer?

An object that is moving in a linear path with an acceleration at a right angle to the motion has a(n) ______________ velocity.

A(n) ______________ quantity has both magnitude and direction.

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

What two quantities are constant in uniform circular motion? ______________ and ______________

If an object has a constant velocity, then its acceleration is ______________.

A freely falling object has a constant acceleration of 9.8 m/s2. This means that

Motion necessarily involves

A rifle bullet shot horizontally has a vertical acceleration of ______________.

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What two quantities are constant in uniform circular motion? and

A freely falling object has a constant acceleration of 9.8 m/s². This means that