The gears on your bicycle suddenly break, you can no longer pedal, and you coast to a stop without using your brakes. Choose

the answer below that best explains what happened to the KE your bike had.

A. It was transferred to the air and to you and transformed into thermal energy

B. It was transferred to the sidewalk and to you and transformed into thermal energy

C. It was transferred to the sidewalk and to the air and transformed into thermal energy

D. It was transferred to the sidewalk and to the air and transformed into mechanical energy

It was t

ransfe

rred to

the ...

It was t

ransfe

rred to

the...

It was t

ransfe

rred to

the...

It was t

ransfe

rred to

the ...

33%

0%

33%33%

Study the pie graph above. Choose the correct scenario below that would be best represented by the pie graphs above.

A. A baseball thrown by the outfielder to home plate.

B. A football kicked straight up and landing where it came from.

C. A bowling ball moving down the lane just before it hits a pin.

D. A skydiver falling before deployment of the parachute.

E. A penny being dropped from the Delaware memorial bridge.

A baseball t

hrown by t..

A footb

all kick

ed stra

igh...

A bowling b

all movin

g ...

A skydiver f

alling b

efore...

A penny being dropped...

0% 0% 0%0%0%

My wife and I like to ride bicycles. She is exactly half of my mass. If she rides twice as fast as I do, which

one of us has the most KE?

A. Mr. HaileyB. Mrs. HaileyC. Neither, the KE is

the sameD. There is not enough

information to say which one has the most KE! M

r. Haile

y

Mrs.

Haile

y

Neither, t

he KE is th

e same

There is

not enough

in...

0% 0%0%0%

Explain your answer to the previous question. Tell me how you know the answer is correct. Hint use

the equation/formula!A. We both have the same energy

cuz even though she is ½ the mass she is moving twice as fast

B. She has more energy cuz speed/velocity is squared in the KE equation, which means speed/velocity counts

more than massC. She has more energy because the

equation says to take ½ the mass and ½ my mass is equal to hers.

D. I have more energy cuz I’m more massive and mass is what gives objects energy.

We both

have th

e same ...

She has more

energy cu

z...

She has more

energy be...

I have m

ore energ

y cuz I

..

0% 0%0%0%

5. When an EM wave is absorbed by a material, where does the energy go?

A. Stays in the waveB. Changes to thermalC. continues throughD. It is destroyed

Stays in th

e wave

Changes to th

ermal

continues t

hrough

It is d

estroyed

0% 0%0%0%

When I drop my bowling ball to the ground an energy transformation takes place. Describe that nrg chain.

A. The potential energy of the ball is transformed to the KE of the ball as it falls until right before it hits the ground most of the PE became KE and some of it became thermal energy.

B. The ball has KE and it is transformed to PE and thermal energy as it falls

C. The ball has PE and KE and it changes to thermal energy as it falls doing work on the air moving it aside.

D. We don't know enough about the energy since it was not measured. Therefore we cannot make a correct determination

The potential e

nergy of ..

.

The ball has K

E and it is t

...

The ball has P

E and KE an...

We don't k

now enough ...

0% 0%0%0%

When a car is crashed the airbags deploy which increases the stopping distance of the occupants. How does increasing the stopping distance affect the occupants stopping force?

A. Force increasesB. Force decreases C. Force remains

constantD. The Force becomes

zero. Force

incre

ases

Force

decrease

s

Force

remains c

onstant

The Force beco

mes zero

.

0% 0%0%0%

Lude Skytalker uses his ray gun to blast Derik Invader in outer space. Explain why Lupe sees the explosion but

does not hear it. A. EM waves can travel in space and that includes the visible spectrum that carries the image of the explosion while sound waves cannot travel in space.

B. Sound waves are absorbed by EM waves and since there aren’t any sound detectors only the light can make it back to Lude.

C. Only the EM light waves have a high enough frequency to travel in space while sound has low frequency waves that can’t travel.

D. Sound waves travel much too fast for human ears to hear them when in outer space and EM waves are slower. EM

waves c

an tr

avel in

s...

Sound waves a

re abso

rb..

Only th

e EM lig

ht wav

es...

Sound w

aves tra

vel m

u..

0% 0%0%0%

Explain your answer to the last question. Why or why not can EM and sound waves

travel in space.

A. EM waves do not need matter to "bump into" to travel while sound waves require matter to "bump into" to travel.

B. EM waves need matter to "bump into" while sound waves need matter to "bump into to travel.

C. Space absorbs the EM waves enabling them to travel through the space/time continuum while sound just bounces off of space and is warped.

EM w

aves do not n

eed m...

EM w

aves need m

atter t...

Space abso

rbs t

he EM w

...

0% 0%0%

30

When you stretch a spring or a rubber band, you are storing energy into the spring or rubber band. What kind of energy is this called?

A. KineticB. gravitational

potentialC. chemical potentialD. elastic potentialE. Spring potential

Kinetic

gravitational p

otential

chemica

l potential

elastic p

otential

Spring potential

0% 0% 0%0%0%

30

Look at the diagram above. You saw this same diagram in question #2. The dark areas represent GPE and the light colored areas represent KE. Why do all of the circles stay the same size?

A. The circles represent the total energy which never changes

B. The circles represent the heat energy available

C. The circles represent the KE and PE together

D. The circles represent the circle of life. Akuna matata baby!

The circl

es represe

nt the ...

The circl

es represe

nt the...

The circl

es represe

nt the...

The circl

es represe

nt the ...

0% 0%0%0%

30

If you go into the gym before anyone else gets there you would hear the echo of your footsteps resounding as you walked to the

locker room. But if the gym is full of people bouncing balls, talking, laughing and maybe even yelling, you would not be able

to hear the echo of your footsteps. Explain why you hear the echo when it is quiet but not when it is noisy.

A. The sound of your footsteps is not loud enough when the gym is noisy and you just can't hear the echo.

B. The sound wave is absorbed by the action of everyone’s activity when it is noisy but when it is quiet the sound wave is reflected and you hear the echo.

C. The sound wave is blocked by the noise from the activity of the people and can't be reflected to you.

D. The sound wave is cancelled by the other sound waves when is is noisy and not when it is quiet. The so

und of your f

ootst...

The sound w

ave is ab

sor..

.

The sound w

ave is block

..

The sound w

ave is ca

ncel...

0% 0%0%0%

30

Waves transfer…..

A. materialB. motionC. massD. energy

materia

l

motionmass

energy

0% 0%0%0%

30

14. Mechanical waves travel faster in denser medium because….

A. They are lighter and can avoid being absorbed by matter

B. When there is less space between particles of matter they can bump into it faster.

C. They need matter to travel in so the more there is the faster they go

D. Sike! Mechanical waves don’t travel faster in denser medium!

They are lig

hter a

nd can...

When th

ere is le

ss sp

ace ...

They need m

atter to tr

av..

Sike! M

echanica

l wave

s ...

0% 0%0%0%

30

EM waves travel faster in less dense medium because…..

A. They are heavy waves and the less dense the medium the faster they go cuz there’s less stuff to push.

B. Sike! They travel faster in more dense medium cuz they need stuff to bump into!

C. EM waves get absorbed and re-emitted by matter and that takes time which slows them down.

D. EM waves wiggle faster when heavy matter is making them wiggle so they move faster.

They are heavy

waves a

n...

Sike! T

hey tra

vel faste

r i...

EM w

aves get a

bsorb

ed ...

EM w

aves wigg

le faste

r ...

0% 0%0%0%

30

Mechanical waves need matter to travel while EM waves do not need matter to be

able to travel.A. TrueB. FalseC. Need more info

True

False

Need more in

fo

0% 0%0%

30

17 All EM waves travel the same speed, the speed of light, through space.

A. TrueB. FalseC. Need more info

True

False

Need more in

fo

0% 0%0%

30