Energy Test

Question 1

is a spring, compressed or stretched, Kinetic or Potential Energy?

Answer 1

POTENTIAL ENERGY

Question 2

is the breeze that hits you when a car drives by Kinetic or Potential Energy?

Answer 2

KINETIC ENERGY

Question 3

what type of energy is friction?

Answer 3

THERMAL ENERGY

Question 4

what is POWER

Answer 4

Joules per second

Question 5

what is WORK

Answer 5

a change in energy

Question 6

what is a Watt? (400 watts = )

Answer 6

Joules per second (400 Watts = 400 J/s)

Question 7

what does kinetic plus potential energy (plus thermal energy) equal?

Answer 7

Mechanical Energy / Total Energy

Question 8

what type of energy is waving your hand?

Answer 8

mechanical
(it moves like a pendulum, metronome)

Question 9

what type of energy is a car accelerating?

Answer 9

kinetic

Question 10

what type of energy never changes on a skateboarder’s route?

Answer 10

TOTAL ENERGY

Question 11

what is the law of conservation of energy?

Answer 11

energy can not be created or destroyed, only transformed

Question 12

what is a Joule?

Answer 12

enough energy to push with a force of one newton for one meter

Question 13

what UNITS must energy measurements ALWAYS be in?

Answer 13

Energy: JOULE
Mass: KILOGRAM
Height: METERS
Velocity: METERS/SEC

Question 14

what does friction/thermal energy do?

Answer 14

eats up energy
when going down a ramp, PE will be greater at top than KE at bottom

when going up a ramp, KE will be greater at bottom than PE at top

Question 15

if different-shaped slides are frictionless, how will the speeds compare?

Answer 15

all be the same speed! (same height, PE at top will equal KE at bottom!)