Question 1

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 2

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 km...

Question 3

Which one of the following is true for deceleration?

Accepted Answer

A)  The acceleration is in the direction opposite the motion. 
B)  The acceleration is zero. 
C)  The acceleration is necessarily negative. 
D)  The velocity remains constant. 
A)  The acceleration is in the direction opposite the motion. 
B)  The acceleration is zero. 
C)  The acceleration is necessarily negative. 
D)  The velocity remains constant.

Question 4

An object that is moving with an acceleration different from zero will always have a(n)______________ velocity.

Accepted Answer

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

Question 5

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 6

For which of the following is the acceleration constant?

Accepted Answer

A)  Nonuniform speed 
B)  Free fall 
C)  Uniform circular motion 
D)  None of these 
A)  Nonuniform speed 
B)  Free fall 
C)  Uniform circular motion 
D)  None of these

Question 7

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 8

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 9

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 of...

Question 10

A golfer hits a ball on a level fairway at an angle of 30° relative to the horizontal,and it lands on the green.Another golfer hits a ball with the same speed but at an angle of 60°,and it lands on the green by the other ball.Which statement is accurate for this situation?

Accepted Answer

A)  One ball is in the air longer than the other. 
B)  One ball experiences a greater acceleration while in free flight. 
C)  One ball experiences a smaller acceleration while in free flight. 
D)  Two balls hit at the same speed but different angles will always land in the same location. 
E)  Two balls hit at the same speed but different angles can never land in the same location. 
A)  One ball is in the air longer than the other. 
B)  One ball experiences a greater acceleration while in free flight. 
C)  One ball experiences a smaller acceleration while in free flight. 
D)  Two balls hit at the same speed but different angles will always land in the same location. 
E)  Two balls hit at the same speed but different angles can never land in the same location.

Question 11

The centripetal acceleration of an automobile in uniform circular motion on a flat circular track is supplied by ______________.

Accepted Answer

The answer of The centripetal acceleration of an automobile in...

Question 12

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.

Question 13

Speed is a(n)______________ quantity.

Accepted Answer

The answer of Speed is a(n)______________ quantity....

Question 14

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

Accepted Answer

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

Question 15

An acceleration may result from

Accepted Answer

A)  a change in speed. 
B)  a change in direction. 
C)  a change in both speed and direction. 
D)  all of these 
A)  a change in speed. 
B)  a change in direction. 
C)  a change in both speed and direction. 
D)  all of these

Question 16

The rate at which an object's velocity changes with time is called its

Accepted Answer

A)  instantaneous velocity. 
B)  motion. 
C)  speed. 
D)  acceleration. 
A)  instantaneous velocity. 
B)  motion. 
C)  speed. 
D)  acceleration.

Question 17

Two objects are in uniform circular motion at the same speed but at different radii.The one with the ______________ radius has the largest centripetal acceleration.

Accepted Answer

The answer of Two objects are in uniform circular motion...

Exam 2: Motion

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

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?

Which one of the following is true for deceleration?

An object that is moving with an acceleration different from zero will always have a(n)______________ velocity.

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

For which of the following is the acceleration constant?

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?

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

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

A golfer hits a ball on a level fairway at an angle of 30° relative to the horizontal,and it lands on the green.Another golfer hits a ball with the same speed but at an angle of 60°,and it lands on the green by the other ball.Which statement is accurate for this situation?

The centripetal acceleration of an automobile in uniform circular motion on a flat circular track is supplied by ______________.

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

Speed is a(n)______________ quantity.

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

An acceleration may result from

The rate at which an object's velocity changes with time is called its

Two objects are in uniform circular motion at the same speed but at different radii.The one with the ______________ radius has the largest centripetal acceleration.

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