Apologia Physical Science Module 9

Front 1

Reference point

Back 1

A point against which position is measured

Front 2

Vector quality

Back 2

A physical measurement that contains directional information

Front 3

Scalar quantity

Back 3

A physical measurement that does not contain directional information

Front 4

Acceleration

Back 4

The time rate of change of an objects velocity

Front 5

Free fall

Back 5

The state of an object that is falling toward the earth with nothing inhabiting its fall

Front 6

if an objects position does not change relative to a reference point, is it in motion relative to that reference point?

Back 6

Nope

Front 7

a glass of water sits on a counter. Is it in motion?

Back 7

It depends on your reference point

Front 8

A child in an inner tube on a still lake. His position does not change. He watches two girls jog along the shore. The girls are keeping perfect pace with each other.
A. Relative to whom is the child in motion
B. relative to whom is the first girl in motion
C. Relative to whom is the second girl not in motion

Back 8

A. The girls running
B. the kid on the inner tube
C. The first girl

Front 9

What is the speed of a boat that travels 10 miles in 30 minutes? Answer in miles per hour.

Back 9

30min. 1hr
---------✖----- = 5hr
1 60min

10mi. Miles
-------= 20--------
.5hr. Hours

Front 10

What is the speed of a runner who runs 6 kilometers in 45 min. Answer in meters per sec

Back 10

2.21 meters/sec

Front 11

A.10 meters
(Vector or scalar quantity? Speed, distance, velocity, acceleration or none. This goes for a-f)

Back 11

Scalar quantity, distance

Front 12

B. 1.2 meters/second squared east

Back 12

Vector quantity, acceleration

Front 13

C. 3.4 feet/hour and slowing

Back 13

Scalar quantity, speed

Front 14

D. 56 liters

Back 14

Scalar, none

Front 15

E. 2.2 miles/ minute west

Back 15

Vector quantity, velocity

Front 16

F. 2.2 millimeters/year

Back 16

Scalar quantity, speed

Front 17

A car and a truck are traveling north on a highway. The truck has a speed of 45 miles per hour and the car has a speed of 57 miles per hour. If the truck is ahead of the car, what is the relative velocity.

Back 17

12 miles per hour

Front 18

If an object travels for 15 min with constant velocity of 12 miles per hour west, what is the acceleration.

Back 18

None. No change on velocity, acceleration is 0

Front 19

A sports car goes from a velocity zero to a velocity of 12 meters per second east in 2 seconds. What's the cars acceleration?

Back 19

6 meters/ sec squared east

Front 20

If a train is traveling at 30 mile per hour south and takes 12 minuets to come to a stop, what is the trains acceleration?

Back 20

105 mi/hr squared

Front 21

A very prickly physicist state that it is impossible for any object to free fall near the earths surface. Why are they correct?

Back 21

Because of air resistance

Front 22

You put a penny and a feather In an airless tube and invert it. Which will hit the bottom first ?

Back 22

The both hit the at the same time

Front 23

What is the height of a building in meters if it takes a rock 4.1 seconds to drop from its roof?

Back 23

82.37 meters

Front 24

A balloonist drops a rock from his balloon. It takes 7 sec for the rock to fall to the ground. What balloons altitude in feet?

Back 24

784ft

Front 25

A scientist decides to measure acceleration by measuring the distance that a moving object travels in a set time interval. The scientist notices tat in every thirty second interval, the object travels less distance than it did in the previous interval. Is the direction I'd the acceleration the same or opposite to the velocity?

Back 25

Opposite