Forms of Energy
type of energy in a heated iron
thermal
In all energy transformations, some energy is always converted into what type of energy?
waste thermal energy
speed and mass
Pushing on a wall until you are exhausted will result in how much work done?
NONE
when any two things rub against each other, what is always produced
friction (thermal energy)
hot water is an example of what type of energy
thermal
when one type of energy changes into another type of energy
transformation
as a sled slides down a hill, what happens to the total sum of kinetic and potential energies
remains the same
what force stops an object from sliding down a hill
friction
amount of gravitational potential energy is dependant on what two things
weight and height off the ground
mechanical energy
as a person rides up a escalator as constant speed what happens to their kinetic and potential energies
kinetic stays the same and potential increases
if an object is off the ground it has what
potential energy
how could you increase friction
make a surface rough
splitting an atom produces what type of energy
nuclear
a green plant has what type of energy
chemical energy
what type of energy transformation occurs when a hand crank generator lights a light bulb
mechanical into electrical
at what point during free fall does an object's potential and kinetic energies equal each other
half way between start and finish
amount of work done is a measure of force multiplies by what
distance
sunlight is an exampe of what type of energy
radiant
a rubber band contains what type of energy
elastic potential energy
what type of energy does a microwave use to heat food
radiant
when an object is pushed off a desk, where is the potential energy and the kinetic energy at their greatest
potential at the top, kinetic at the bottom
if a person pushes a box to the right, what direction must the box move in order for work to be done
to the right
The law of conservation of energy states that energy .......
cannot be created or destroyed