Physics Energy Flashcards
Energy is the ability
to do work
The product of the net force on an object and distance through which the object is moved (or f x d) equals
Work
Force is measured using which unit?
Newtons
Your friend’s car is stuck in the snow. You push very hard and become very tired but the car won’t move. Did you do work?
No, work wasn’t done
A weight lifter picks up a very heavy barbell. When he is lifting the barbell..
He does work
How much work you do in a certain amount of time is called..
Power
If a new fork lift can do the four times the amount of work in the same amount of time of an old forklift, then the new forklift is…
Four time as powerful
Energy stored in an object due to its position is called
potential energy
Gravitational potential energy of an object is dependent on
the mass and height of the object
A large stone raised to the top of a hill is known to have this type of energy…
Gravitational Potential Energy
This type of energy requires that the object is in motion…
Kinetic Energy
Energy that is stored in a battery is called…
chemical energy
If an object has a mass “m” and increases it’s speed by 2 times, what happens to the amount of kinetic energy?
Increases by four
Who came up with the famous equationE = mc2
Einstein
According to Einstein, energy is another form of …
matter
Kinetic energy is equals to?
= 1/2 mass X velocity2
The law that energy can be neither created or destroyed is called the law of
conservation of energy
The unit we use to measure work is the
joule
Work is done when a weightlifter holds a barbell still above his head.
False
Energy due to motion is
kinetic energy
