Work
KE/PE
Waves
Cons. of Energy
Power
100
In order for work to be done, what must be true of force and displacement
they must be parrallel
100
if an object is not moving it has _____ KE
0
100

When does light travel the fastest 

In a vacuum 

100

When is mechanical energy conserved? in other words, in a closed system if no energy is being lost it is because....

when there is no friction

100
The unit for powe is called the
Watt. Know the other forms.
200
If the sign of work is positive, this means that .....
force and displacement are in opposite directions. Example: friction
200

Potential energy is the energy due to ____

Position 

200

When do sound waves travel the fastest?

Through a solid medium

200
Which of the following is a form of mechanical energy a. Internal b. Electrical c. Chemical potential d. Gravitational potential
D
200
If a job done two different ways requires the same amount of work, how is power affected
depends on the time
300
a car slows down on a flat road. is work being done
yes
300

The work done lifting an object is _____ its change in potential energy

Equal to

300

If an ambulance moves toward you and then passes and moves away from you, how would its siren sound?

The frequency would increase and then decrease as it moved away from you

300
Friction converts kinetic energy to ___
Heat
300

DAILY DOUBLE: 

Gamma Rays (Highest Frequency and Energy, shortest wavelength)

X-Rays

UV Light

Visible light (V,I,B,G,Y,O,Y)

IR Radiation 

Microwaves

RadioWaves (Lowest Frequency, Energy and longest Wavelength

400
What is the units of Work
Joules, N*m or Kgm^2/s^2
400

If the velocity of an object triples its KE will be

greater

400

What is the meaning of the speed of light?

It is the speed at which light travels in a vacuum and nothing travels faster than it. 

400
if friction is negligible, the what will be the kinetic enregy of an arrow that is shot out of a bow that has a potenital energy of 70 J
70 J
400
If the power an object has triples what will happen to its speed
it will triple
500
If speed is constant during the motion, will it affect how kuch work is done
no
500
If friction is the only force acting on an object will its KE will?
decrease
500

Most comic book superhero characters frequently bend, if not break the laws of science as they fight crime. Which is the most common law in science that a superhero comic book character such as the Flash and Superman are guilty of breaking?

Going faster than the speed of light. 

500

Energy is changed from one form to another with no net loss or gain is ________ (T or F)

Always true

500

A little story about Jack and Diane. Jack weighs 150 pounds and Diane weighs 120 pounds. Jack runs up a flight of stairs while Diane walks slowly up the same flight of stairs. At the top of the stairs, Jack feels exhausted and out of breath but Diane feels just fine. Who used more power, Jack or Diane?

Jack had more power because it took less time to get up the stairs.

M
e
n
u