5 - Definitions Flashcards
Work Done =
J or Nm
Force ✖️Distance moved (in direction of force)
Work done is equal to
Energy transferred
Force at and angle
\ | ㅇ \ | ---[||]
W =Fxcosㅇ
Will a perpetual motion machine keep going without inputting anymore energy?
No because everything follows the principle of conservation of energy.
Energy is equal to
J
It’s the capacity for going work.
Scalar Quantity.
Kinetic energy is
The energy due to the movement of an object.
GPE is
Potential energy due to the position of an object in the Earth’s gravitational field.
Potential means:
Stored
Chemical energy
Energy contained within the chemical bonds between atoms, released when atoms are rearranged.
Elastic Potential Energy
Energy stored in an object as a result of a reversible change in shape.
Electrical Potential Energy
Energy of electric charges due to their position in an electric field.
The principle of conservation of energy states:
The total energy of a closed system remains constant: energy can’t be created or destroyed but transferred from one form to another.
K.E =
KE = half m x v^2
For objects travelling at the same speed KE is directly proportional to
Mass
GPE is equal to
An objects capacity for doing work due to its position in the gravitational field.
