Quiz about Mechanical Energy Midpoint Review

Question 1

A runner races in the 100 meter dash.  It takes her 10 seconds to finish.  What is her average speed?

Accepted Answer

10 m/s

Answer

1000 m/s

Answer

100 seconds

Answer

10 seconds

Question 2

What does this graph represent?

Accepted Answer

Constant Speed

Answer

Acceleration

Answer

Not moving

Question 3

Which runner won the race?

Accepted Answer

A

Answer

B

Answer

C

Answer

It was a tie

Question 4

According to the graph how far does the person travel in the first 5 seconds?

Accepted Answer

5 m

Answer

2 m

Answer

10 m

Answer

0 m

Question 5

What is the person doing from 5 seconds to 10 seconds?

Accepted Answer

Standing Still

Answer

Walking

Answer

Running

Answer

Walking Fast

Question 6

Velocity is both ____ and _____.

Accepted Answer

speed , direction

Answer

direction, mass

Answer

volume, density

Answer

direction, magnitude

Question 7

Which of the following represents a velocity?

Accepted Answer

40 m/s north

Answer

40 m

Answer

40 m north

Answer

40 m/s

Question 8

What does this graph represent?

Accepted Answer

Not moving

Answer

Constant speed

Answer

Acceleration

Question 9

What is the speed of the red line?

Accepted Answer

4 m/s

Answer

16 m/s

Answer

32 m/s

Answer

2 m/s

Question 10

Which of the following is a unit of speed?

Accepted Answer

km/hr

Answer

hr

Answer

km

Answer

s

Question 11

65mi/hr South is an example of...

Accepted Answer

Velocity

Answer

Speed

Answer

Acceleration

Answer

Direction

Question 12

An object is _____ if its position changes relative to another object.

Accepted Answer

in motion

Answer

at reset

Answer

a frame of refence

Answer

magical

Question 13

A distance vs. time graph shows an object's

Accepted Answer

speed

Answer

frame of reference

Answer

acceleration

Answer

favorite food

Question 14

When a car goes around a corner at 20 mph, why do we say it  accelerates?

Accepted Answer

The car is accelerating because it's changing direction

Answer

The car is accelerating because of the velocity is constant

Answer

The car accelerates because it's going 20 mph

Answer

Cars always accelerate when they are in motion

Question 15

The tornado is traveling northwest at 20 mph.

Accepted Answer

velocity

Answer

speed

Answer

acceleration

Question 16

The Olympian swam 200 meters in 20 seconds.

Accepted Answer

speed

Answer

velocity

Answer

acceleration

Question 17

Avery likes to walk 30 feet in 10 seconds. What is her speed?

Accepted Answer

3 feet/sec

Answer

6 feet/sec

Answer

10 feet/sec

Answer

2 feet/sec

Question 18

What is velocity?

Accepted Answer

speed in a specific direction

Answer

the quickness of an object

Answer

the location of an object

Answer

acceleration

Question 19

What is the formula to calculate speed?

Accepted Answer

S = d/t

Answer

S = t/d

Answer

S = d x t

Answer

S = t x d

Question 20

65mi/hr South is an example of...

Accepted Answer

Velocity

Answer

Speed

Answer

Acceleration

Answer

Direction

Question 21

What do you need to know about an object to calculate its velocity?

Accepted Answer

Speed and direction

Answer

Speed and time

Answer

Speed and velocity

Answer

Time and direction

Question 22

Which of these objects is NOT accelerating?

Accepted Answer

A hiker moving at the same speed for hours

Answer

A plane slowing down to land

Answer

A rocket taking off into space

Answer

A rollerblader heading downhill

Question 23

Acceleration only takes place when things speed up.

Accepted Answer

False

Answer

True

Question 24

Describe the speed of the object from 4-6 seconds using the distance vs. time graph.

Accepted Answer

Not moving

Answer

Increasing speed

Answer

Decreasing speed

Answer

Constant speed

Question 25

What is the object doing from 10-12.5 seconds?

Accepted Answer

Returning to the starting position

Answer

Slowing down

Answer

Speeding up

Answer

Not moving

Question 26

Which time section is the object moving the fastest?

Accepted Answer

20-30 seconds

Answer

0-10 seconds

Answer

10-20 seconds

Answer

30-40 seconds

Question 27

Which graph is would represent a decrease in speed?

Accepted Answer

Graph C

Answer

Graph A

Answer

Graph B

Answer

The object is not decreasing in speed in any of these graphs

Question 28

When a car goes around a corner at 20 mph, why do we say it accelerates?

Accepted Answer

The car is accelerating because it's changing direction

Answer

The car is accelerating because of the velocity is constant

Answer

The car accelerates because it's going 20 mph

Answer

Cars always accelerate when they are in motion

Question 29

Mechanical energy

Accepted Answer

sum of kinetic and potential energy

Answer

energy built up before being in motion

Answer

energy released in a chemical reaction

Answer

energy of motion

Question 30

According to the Law of Conservation of Energy, energy cannot be _________ or ____________.

Accepted Answer

created, destroyed

Answer

destroyed, destroyed

Answer

created, saved

Answer

lost, found

Question 31

Can you destroy energy?

Accepted Answer

No

Answer

Yes

Question 32

Energy due to motion is ____________ energy.

Accepted Answer

Kinetic

Answer

Potential

Answer

Energy

Answer

Friction

Question 33

The faster an object moves, the ________ kinetic energy it has.

Accepted Answer

more

Answer

less

Answer

none of the above

Answer

all of the above

Question 34

__________ is stored energy.

Accepted Answer

Potential

Answer

Kinetic

Answer

None of the above

Answer

All of the above

Question 35

Gravitational potential energy depends on the ________ and ________ of the object.

Accepted Answer

Height and mass

Answer

Friction and movement

Answer

Mass and Movement

Answer

Height and Friction

Question 36

What kind of energy is in a rock at the edge of a cliff?

Accepted Answer

Potential

Answer

Kinetic

Question 37

What kind of energy is in a person climbing a ladder?

Accepted Answer

Both

Answer

Potential

Answer

Kinetic

Question 38

What kind of energy is in a stretched rubber band?

Accepted Answer

Potential

Answer

Kinetic

Question 39

At which point is potential energy greatest?

Accepted Answer

W

Answer

X

Answer

Y

Answer

Z

Question 40

When a pendulum swings, at which point is kinetic energy highest?

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 41

Which point has the most potential energy?

Accepted Answer

a

Answer

G

Answer

f

Answer

b

Question 42

Explain what happens to the potential energy of a rock as it falls off the side of a cliff.

Accepted Answer

The potential energy decreases as the kinetic energy increases.

Answer

The kinetic energy decreases as the potential energy increases.

Answer

The kinetic energy decreases as the potential energy decreases.

Answer

The potential energy decreases as the kinetic energy decreases.

Question 43

When riding a roller coaster, you go up and down many hills. As you get to the top of a roller coaster, what energy change is taking place.

Accepted Answer

Kinetic energy is changed into potential energy.

Answer

Potential energy is changed into kinetic energy.

Answer

Chemical energy is changed into heat energy.

Answer

Heat energy is changed into chemical energy.

Question 44

What would have the greatest kinetic energy?

Accepted Answer

A car driving down a hill.

Answer

A person running down a hill.

Answer

A ball rolling down a hill.

Answer

leaves rolling down a hill

Question 45

Which is an example of potential energy?

Accepted Answer

the pulled back string on an archers's bow

Answer

a roller coaster speeding down a hill

Answer

releasing the strings on a guitar

Answer

an electric current lighting a light bulb

Question 46

Question 46.

Accepted Answer

Kinetic Energy

Answer

Potential Energy

Question 47

Question 47.

Accepted Answer

Potential Energy

Answer

Kinetic Energy

Question 48

Question 48.

Accepted Answer

Potential Energy

Answer

Kinetic Energy

Question 49

Question 49.

Accepted Answer

Kinetic Energy

Answer

Potential Energy

Question 50

Which is the best example that something has kinetic energy?

Accepted Answer

a tennis ball rolling across the court

Answer

a car parked on a steep hill

Answer

a picture hanging on the wall

Answer

a piece of coal before it's burned

Question 51

If these are all moving at the same speed, the vehicle with the greatest KE would be

(Think about their sizes)

Accepted Answer

Option C is correct

Answer

A.

Answer

B.

Answer

D.

Question 52

A place or object used for comparison to determine if another object is in motion is called a

Accepted Answer

reference point

Answer

comparison point

Answer

point of view

Answer

motion detector

Question 53

The best reference points are stationary (not moving).

Accepted Answer

true

Answer

false

Question 54

Johnny is walking from Mr. Sparks room to go to the front office. He picks up a paper and then goes into Mrs. Stegall's room. What is the POR?

Accepted Answer

Mr. Spark's room

Answer

front office

Answer

Stegall's room

Answer

Point of Reference

Mechanical Energy Midpoint Review

58 questions

A runner races in the 100 meter dash. It takes her 10 seconds to finish. What is her average speed?

What does this graph represent?

Which runner won the race?

According to the graph how far does the person travel in the first 5 seconds?

What is the person doing from 5 seconds to 10 seconds?

Velocity is both and _.

Which of the following represents a velocity?

What does this graph represent?

What is the speed of the red line?

Which of the following is a unit of speed?

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