Types of Energy
energy of motion
kinetic
heat energy
thermal
When electric current flows through the metal filament of a light bulb, electrical energy is converted to _____
heat and light/radiant energy
What energy transformation occurs as a person eats breakfast and then goes for a run?
chemical to kinetic
the law of physics that states that energy cannot be created or destroyed, it just changes forms
Law of Conservation of Energy
potential
energy resulting from movement of charged particles
electrical
Water can provide energy that may be changed into electricity. Which kind of water could be used to provide electricity?
a. pure
b. moving
c. deep
d. cold
B - moving
Provide an example of kinetic energy.
(misc)
What do the "m" and the "v" stand for in the formula for kinetic energy?
mass, velocity
energy of an object off the ground due to gravity
gravitational potential
energy in the sun's rays (not thermal)
radiant
a. mass of object is reduced
b. ramp creates energy
c. ramp requires less force to be used
d. amount of work done is decreased
C - less force required
Solar panels are often used to power homes. What kind of energy do they collect?
solar energy from the sun
also ok: thermal, radiant
What is the unit for energy?
kg * m/s2
OR
Joules
kinetic energy + potential energy
mechanical
energy stored in the bonds between atoms
nuclear
Describe the energy changes that occur as a windmill produces electricity (3 steps)
wind energy -> mechanical energy -> electrical energy
A student rolls a car down a ramp. According to his calculations, the potential energy of the car at the bottom should match the kinetic energy of the car at the top, but it does not match. Explain why.
mechanical energy produces friction, which causes the release of some energy as thermal
A 5 kg object is moving with a velocity of 10 m/s. What is its kinetic energy?
250 J
energy in popping noises released from a chemical reaction
sound energy
energy in food
chemical
Describe the differences in potential and kinetic energy of a ball on a shelf and a ball on the ground.
Neither has kinetic
ball on shelf has more potential
Describe the potential and kinetic energy of a rollercoaster at the top of a hill, halfway down the hill, and at the bottom of the hill.
misc
A 10 kg boulder is stationary at the top of a 20 m hill. What is its gravitational potential energy?
1,960 J