Chapter 4
The energy of motion
Kinetic Energy
An ax is this type of simple machine
Wedge
An object with a high temperature is going to have a higher ________
Kinetic Energy
This is the unit we use to measure energy
Joule
(0.5)(m) x v2 = ?
Kinetic energy KE
This kind of potential energy is in an object that is stretched
Elastic potential energy
Your arm is this class of lever
3rd class
Water makes a good coolant because it has a high ______________
Specific heat
This is the sum of an objects kinetic and potential
Mechanical Energy
m x 9.8 x h
Gravitational Potential energy
This kind of energy is stored in an object above the Earth's surface
Gravitational Potential Energy
In an ideal machine this is 100% of this is converted into work, and not lost
Energy
This type of heat transfer does not require mass
Radiation
An inclined plane with one or two sloping sides.
Wedge
Mechanical Energy =
Potential Energy + Kinetic Energy
This will slow you down if you are swinging on a swing
Air resistance
Power is measured in this unit
Watt
The aluminum in a hydroflask is good insulator against this type of heat transfer
Radiation
A combination of two or more simple machines
Compound machine
Force x Distance =
Work
This must always be conserved
Energy
A pulley is really just a modified type of this simple machine
Lever
Conduction requires this for heat transfer
Matter
The amount of heat needed to raise the temperature of 1 kg of a substance 1 K
Specifice heat
Efficiency =
(Wout/Win) x 100%