Work
This is the amount of force applied over a certain distance OR
________ = Force x distance
Work!
This the rate at which work is done
OR
_______ = Work/time
Power
This is the amount of stored energy in an object based on it's height or _________ = m * g * h
PE (potential energy)
This is the amount of energy an object has while moving or _______ = 1/2*m*v^2
KE (Kinetic Energy)
The unit work is measured in is...
Joules
The unit power is measured in is.....
Watts
The unit PE is measured in is....
Joules!
KE is measured in....
Joules
Another way to express the unit Joules (for work) is....
Newton-Meter
Joule= Newton x meter (force x distance)
This happens to power when you increase the amount of work done?
If you double an object's height, what happens to your PE?
It doubles as well!
If I double an objects velocity, I do this to my kinetic energy.
Quadruple Kinetic Energy- KE becomes 4 times as big.
The direction of displacement and the direction of the force applied are in the SAME DIRECTION. This means that work will be a ________ value.
Positive!
What happens to power when you increase time?
Power DECREASES!
Before an object begins to move, the Total Mechanical Energy (PE + KE) an object has is equal to its_______.
PE!
A pendulum is swinging back and forth. As the pendulum moves from its lowest point to its highest point, its energy transfers from Kinetic Energy to this type of energy.
PE
The direction of the displacement and the direction of the force are PERPENDICULAR TO EACH OTHER. This means that the amount of work done will be _______.
0!
If I do 2000 Joules of work in 5 seconds, I produce this amount of power.
400 Watts of power!
An object moves down a ramp without friction. The object loses potential energy and gains this type of energy.
KE
A hot wheels car is moving down a ramp with friction. The potential energy the car started with is now these types of energy.
What is Kinetic Energy and Thermal/Heat Energy