Definitions
What is work?
WOrk is the transfer of energy through motion.
What is a joule (j)?
This is a unit that measures energy.
Name a kind of kinetic energy.
Examples of kinetic energy include: electrical energy, sound energy, heat energy, and mechanical energy.
What is positive work?
Positive work is when you apply a force and distance (displacement) in the same direction.
Successfully picking up a 50kg box is an example of
work
What is potential energy?
Potential energy is energy that is stored for work that is to be completed later.
What is the formula for work?
Work = force x distance
Name a kind of potential energy.
Examples of potential energy include chemical energy and gravitational energy.
What is negative work?
Negative work is when the force and distance (displacement) go in opposite directions.
When you work to push a car out of the snow and it doesn't move this is an example of...
Effort
What is effort?
Effort is to "try" to do something, without the result of something moving.
What is the formula for finding force?
Force = mass x gravity
A roller coaster going down a hill is an example of...
kinetic energy
What is no work?
No work is when the force and distance (displacement) are moving in a perpendicular way.
When you put down a box that you were holding you are doing ______ work.
Negative
What is kinetic energy?
Kinetic energy is the motion of moving objects.
Can energy be destroyed or created?
No it cannot. Energy can only be transferred from one object to another.
A rollercoaster going up the hill is an example of...
potential energy
When you pick up a box you are doing _______ work.
positive
True or false: when a person cannot pick up an object they are not doing work.
True
What is energy?
Energy is the ability to apply a force to move an object a certain distance.
The combination of newton and meters is called...
Joules
A dog sleeping is using which kind of energy?
Potential energy
When you walk side to side holding a box you are doing _____ work.
no
When the wind blows your hair it does ______ on it.
work