Chapter 3

Question 1

Motion is __.

Answer 1

relative to something else

Question 2

Speed Def.

Answer 2

the distance covered per the amount of travel time (time traveled)

Question 3

Speed Units

Answer 3

meters per second; m/s

Question 4

Average Speed Def

Answer 4

The total distance covered divided by the total travel
time. (Calculated at the end of a trip)

Question 5

The average speed of driving 30 km in 1 hour is
the same as the average speed of driving
A. 30 km in 1/2 hour.
B. 30 km in 2 hours.
C. 60 km in 1/2 hour.
D. 60 km in 2 hours.

Answer 5

D. 60 km in 2 hours.

Question 6

Instantaneous Speed Def

Answer 6

the speed at any instant

Question 7

Velocity Def (2)

Answer 7

Description of both
* the instantaneous speed of the
object.
* the direction of travel.

Question 8

Velocity is the rate at which ___

Answer 8

distance traveled changes over time

Question 9

Velocity Equation

Answer 9

Velocity = acceleration x time

Question 10

Velocity is a ____. It has __
Velocity is ___ speed

Answer 10

Vector quantity
Magnitude (speed) and Direction
Directed Speed

Question 11

Constant speed is ___

Answer 11

steady speed, neither speeding up nor slowing down

Question 12

Constant velocity is ___

Answer 12

1. constant speed and
2. constant direction (straight-line path
   with no acceleration)

Question 13

Motion is relative to ___

Answer 13

Earth, unless otherwise stated.

Question 14

Acceleration Def

Answer 14

Rate at which velocity changes over time

Question 15

Acceleration involves ____

Answer 15

A change in speed, direction, or both

Question 16

An automobile is accelerating when it is
A. slowing down to a stop.
B. rounding a curve at a steady speed.
C. Both of the above.
D. Neither of the above.

Answer 16

C. Both of the above.

Question 17

Acceleration and velocity are actually
A. the same.
B. rates but for different quantities.
C. the same when direction is not a factor.
D. the same when an object is freely falling.

Answer 17

B. rates but for different quantities.

Question 18

Acceleration is the rate at which ___

Answer 18

velocity changes over time.

Question 19

Who did work with acceleration?

Answer 19

Galileo

Question 20

When air resistance is negligible, all objects fall ___

Answer 20

with the same unchanging acceleration

Question 21

Free Fall

Answer 21

Falling under the influence of gravity only-with no air resistance

Question 22

What is the rate of Free Falling objects?

Answer 22

10 m/s^2

Question 23

At a particular instant a free-falling object has a
speed of 30 m/s. Exactly 1 s later its speed will be
A. the same.
B. 35 m/s.
C. more than 35 m/s.
D. 60 m/s.

Answer 23

C. more than 35 m/s.

Question 24

Distance Equation (for free fall?)

Answer 24

Distance = (1/2) x acceleration x time x time

Question 25

What is the distance fallen after 4 s for a freely falling object starting from rest? A. 4 m B. 16 m C. 40 m D. 80 m

Answer 25

D. 80 m

Question 26

The 60-km/h crosswind blows the 80-km/h airplane off course at 100 km/h. If the crosswind were 80 km/h, the airplane would travel at 113 km/h at an angle of A. less than 45 degrees. B. 45 degrees. C. more than 45 degrees. D. None of the above are correct. Vectors

Answer 26

B. 45 degrees

Question 27

You run horizontally at 4 m/s in a vertically falling rain that falls at 4 m/s. Relative to you, the raindrops are falling at an angle of A. 0°. B. 45°. C. 53°. D. 90°.

Answer 27

B. 45°

Question 28

Kinematics Def

Answer 28

motion in terms of velocity, position, and acceleration

Question 29

Travel Distance Equation

Answer 29

d=1/2(a)t^2