Quiz about WCAS Science

Question 1

The process of changing energy from one form to another is...

Accepted Answer

Transformation

Answer

Transfer

Answer

Transmission

Answer

Transportation

Question 2

The law of conservation of energy states that energy can neither be destroyed nor created. According to this law which of these equations is correct?

Accepted Answer

Energy in=energy out

Answer

Energy in=energy out

Answer

E=MC2

Answer

KE=PE

Question 3

Name the five forms of Kinetic energy:

Accepted Answer

all of them

Answer

Mechanical thermal

Answer

radiant electrical

Answer

sound

Question 4

Name the four forms of potential energy:

Accepted Answer

Mechanical Chemical nuclear electrical

Answer

Mechanical Chemical nuclear sound

Answer

Mechanical Chemical sound electrical

Answer

none of these

Question 5

Name the form of energy that takes place with wind

Accepted Answer

mechanical

Answer

thermal

Answer

radiant

Answer

sound

Question 6

Name the form of energy that takes place with fire

Accepted Answer

thermal

Answer

chemical

Answer

sound

Answer

radiant

Question 7

Name the form of energy that takes place with a microwave

Accepted Answer

chemical

Answer

radiant

Answer

sound

Answer

mechanical

Question 8

Name the form of energy that takes place with talking

Accepted Answer

sound

Answer

nuclear

Answer

radiant

Answer

chemical

Question 9

Name the form of energy that takes place with lightning

Accepted Answer

electrical

Answer

chemical

Answer

thermal

Answer

nuclear

Question 10

Name the form of energy that takes place with with a bow and arrow

Accepted Answer

mechanical

Answer

thermal

Answer

chemical

Answer

sound

Question 11

Name the form of energy that takes place with fuel

Accepted Answer

chemical

Answer

radiant

Answer

sound

Answer

thermal

Question 12

Name the form of energy that takes place with fusion of atoms

Accepted Answer

nuclear

Answer

sound

Answer

chemical

Answer

radiant

Question 13

Select all the energy transformations that occur in an hair dryer

Accepted Answer

Mechanical KE

Accepted Answer

electrical

Accepted Answer

thermal

Answer

sound

Question 14

Select all the energy transformations that occur in an electric keyboard

Accepted Answer

electrical

Accepted Answer

sound

Answer

Mechanical KE

Answer

nuclear

Question 15

Select all the energy transformations that occur in during photosynthesis

Accepted Answer

radiant

Accepted Answer

chemical

Answer

Nuclear

Answer

thermal

Question 16

Select all the energy transformations that occur in an hydropower dam

Accepted Answer

electrical

Accepted Answer

Mechanical KE

Accepted Answer

Mechanical PE

Answer

chemical

Question 17

Select all the energy transformations that occur in an hot air ballon

Accepted Answer

Chemical

Accepted Answer

Thermal

Accepted Answer

Mechanical KE

Answer

sound

Question 18

Which runner won the race?

Accepted Answer

Runner A

Answer

Runner B

Answer

Runner C

Answer

shelton is a potato

Question 19

Question 19.

Accepted Answer

Accelerating then traveling at constant speed

Answer

Accelerating then decelerating

Answer

Decelerating then traveling at constant speed

Answer

Traveling at constant speed then decelerating

Question 20

During which segment did the car come to a complete stop?

Accepted Answer

Segment B to C

Answer

Segment A to B

Answer

Segment C to D

Answer

Segment D to E

Question 21

Which runner ran at a constant speed?

Accepted Answer

Runner A

Answer

Runner B

Answer

Runner C

Answer

Shelton is a potato

Question 22

Question 22.

Accepted Answer

1125 m

Answer

1625 m

Answer

1500 m

Answer

1000 m

Question 23

Which runner had a bad start to his race?

Accepted Answer

Runner B

Answer

Runner A

Answer

Runner C

Answer

Shelton is a potato

Question 24

Describe the motion of the object in the diagram.

Accepted Answer

The object moved at a constant speed, then stopped, returned to the beginning and moved back in the original direction very fast at a constant speed.

Answer

The object is accelerating at an increasing rate, and then moving at a constant velocity/speed.

Question 25

Estimate how many hours passed when the trip was at 100 km.

Accepted Answer

About 16-17

Answer

About 10 to 15

Answer

About 5 to 10

Answer

About 18-23

Question 26

During which segment did the car travel the fastest?

Accepted Answer

Segment D to E

Answer

Segment A to B

Answer

Segment C to D

Answer

Segment B to C

Question 27

During which segment did the car travel back towards its starting position?

Accepted Answer

Segment C to D

Answer

Segment A to B

Answer

Segment B to C

Answer

Segment D to E

Question 28

Describe the motion of the object in the diagram.

Accepted Answer

The object is accelerating at an increasing rate.

Answer

The object is moving at a constant velocity/speed.

Answer

Connor likes laney smith

Answer

Carson shelton likes izzy marcum

Question 29

Which runner accelerated the fastest at the start of the race?

Accepted Answer

Runner C

Answer

Runner A

Answer

Runner B

Answer

same.

Question 30

In this velocity vs. time graph, the person at point C:

Accepted Answer

has negative acceleration.

Answer

Not enough information to determine.

Answer

has positive acceleration.

Answer

has zero acceleration.

Question 31

A horizontal (flat) line on a velcoty vs. time graph shows _______ acceleration.

Accepted Answer

zero

Answer

positive

Answer

changing

Answer

negative

Question 32

3 m/s north in an example of a(n):

Accepted Answer

Velocity

Answer

Acceleration

Answer

Time

Answer

Speed

Question 33

What does the slope of a distance vs. time graph tell you?

Accepted Answer

The speed of the object

Answer

The total distance traveled

Answer

The time it took for the object to travel

Answer

The acceleration

Question 34

What does the slope of this graph tell you?

Accepted Answer

speed

Answer

distance

Answer

time

Answer

acceleration

Question 35

Motion is a change in:

Accepted Answer

position

Answer

velocity

Answer

speed

Answer

time

Question 36

In this velocity vs. time graph, the person at point B:

Accepted Answer

has zero acceleration

Answer

not enough information to determine.

Answer

has positive acceleration

Answer

has negative acceleration.

Question 37

An indicator that orients you when describing motion is called the:

Accepted Answer

reference point

Answer

speed

Answer

point of motion

Answer

time

Question 38

What is true about a car with constant velocity?

Accepted Answer

it has zero acceleration

Answer

it has a positive acceleration

Answer

it has a negative acceleration

Answer

it has a changing direction

Question 39

How long will it take an object traveling at 25 m/s to reach a distance of 125 meters?

Accepted Answer

5 s

Answer

0.2 min

Answer

5 m

Answer

0.2 s

Question 40

Acceleration is a rate of change of _____.

Accepted Answer

velocity

Answer

position

Answer

speed

Answer

time

Question 41

If you ride your bike down a straight road for 500 m then turn around and ride back to your starting point, your distance is____ your displacement.

Accepted Answer

Greater than

Answer

Can't determine

Answer

Equal to

Answer

Less than

Question 42

A high-speed train travels with an average speed of 227 km/hr. The train travels for 2 hrs. How far does the train travel?

Accepted Answer

454 km

Answer

0.0088 km

Answer

113.5 km

Answer

225 km

Question 43

The speed you read on a speedometer is___.

Accepted Answer

Instantaneous speed

Answer

Velocity

Answer

Average speed

Answer

Constant speed

Question 44

The graph below represents the change in velocity of four cars over a period of 10 hours. Which line represents the car with the greatest acceleration?

Accepted Answer

Car A

Answer

Car B

Answer

Car C

Answer

Car D

Question 45

Find the acceleration of a car that goes from 32 m/s to 96 m/s in 8.0 s.

Accepted Answer

8.0 m/s2

Answer

-8.0 m/s2

Answer

12 m/s2

Answer

4.0 m/s2

Question 46

At what point is the rate of change of velocity the greatest?

Accepted Answer

A

Answer

B

Answer

C

Answer

Not enough information to determine

Question 47

Which statement about the movement of an object with zero acceleration could be true?

Accepted Answer

the object is moving at a constant speed

Answer

the object is changing direction

Answer

the object is slowing down

Answer

the object is speeding up

Question 48

In this velocity vs. time graph, the person at point A:

Accepted Answer

has positive acceleration

Answer

has zero acceleration.

Answer

Not enough information to determine.

Answer

has negative acceleration.

Question 49

What variable is on the Y-axis on this graph?

Accepted Answer

velocity

Answer

motion

Answer

acceleration

Answer

time

Question 50

A cross-country runner runs 10 km in 40 minutes. What is his average speed?

Accepted Answer

0.25 km/min

Answer

30 km/min

Answer

4 km/min

Answer

400 km/min

Question 51

A car travels a distance of 98 meters in 10 seconds. What is the average speed of the car?

Accepted Answer

9.8 m/s

Answer

4.9 m/s

Answer

49 m/s

Answer

98 m/s

Question 52

What is the instantaneous speed at 5 s?

Accepted Answer

6 m/s

Answer

30 m/s

Answer

30 mi/hr

Answer

5 mi/hr

Question 53

A car moves around a wide turn going 45 mi/hr the whole time. The car has a constant:

Accepted Answer

speed

Answer

Velocity

Answer

direction

Answer

acceleration

Question 54

Which of the laws of motion states, "To every action there is an equal but opposite reaction?"

Accepted Answer

Newton's 3rd Law

Answer

Newton's 1st Law

Answer

Law of Conservation of Momentum

Answer

Newton's 2nd Law

Question 55

Consider a watermelon that starts from rest and drops straight down from a tall building. Air resistance can be ignored. Which statement about the watermelon's motion is FALSE?

Accepted Answer

The watermelon falls at a constant velocity

Answer

The watermelon has a positive acceleration

Answer

The watermelon speeds up as it falls

Answer

The watermelon's acceleration due to gravity is 9.8 m/s2

Question 56

A person is on a paddleboard. The person exerts a force on the water with the paddle, causing the water to move. The paddleboard also moves, but in the opposite direction. Which statement best explains why this happens?

Accepted Answer

action and reaction forces

Answer

Newton's second law of motion

Answer

inertia

Answer

Law of Conservation of Momentum

Question 57

Momentum describes

Accepted Answer

How much force is needed to change an object's motion

Answer

How much velocity changes in a given amount of time

Answer

The tendency of an object to resist a change in motion

Answer

The balanced forces on a falling object with a constant speed

Question 58

Which of the following factors does NOT affect air resistance?

Accepted Answer

spin

Answer

Speed

Answer

shape

Answer

size

Question 59

If a bicyclist has a mass of 70 kg and a velocity of 25 m/s, what is the momentum of the bicyclist? Use the formula: p=mv.

Accepted Answer

1,750 kg*m/s

Answer

1200 kg*m/s

Answer

680 kg*m/s

Answer

2100 kg*m/s

Question 60

A 98 kg man is accelerating forward at a rate of 1.2 m/s2. What is the unbalanced force necessary to produce this movement?

Accepted Answer

117.6 N

Answer

102.2 N

Answer

139 N

Answer

88.4 N

Question 61

Carl and Juan are playing catch. Carl throws a fastball to Juan and it hurts Juan's hand. Why is this the case?

Accepted Answer

Greater the acceleration, greater the force

Answer

Greater the mass, the less the force

Answer

Greater the mass, greater the acceleration

Answer

Greater the acceleration, the less the force

Question 62

A runner has a speed of 25 m/s. They see the finish line and speed up to 30 m/s. This happens in 5 seconds. IF the runner has a mass of 75 kg, with what force did the runner cross the finish line?

Accepted Answer

75 N

Answer

85 N

Answer

65 N

Answer

55 N

Question 63

Which of the following items has the most inertia?

Accepted Answer

the teacher

Answer

a water bottle

Answer

your textbook

Answer

a pencil

Question 64

A 700 kg car is driving with an acceleration of 5 m/s₂down the interstate. What is the force required to accelerate the car?

Accepted Answer

3,500 N

Answer

14 N

Answer

0.071 N

Answer

650 N

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