Work, Energy & Power Flashcards
1
Q
Define Work
A
Force × Distance moved by the object in the direction of the force
Work done= FxcosØ
2
Q
Define Energy
A
It is the capacity of doing work
Energy transferred= Work dond
3
Q
State the principle of conservation of energy
A
1) Energy cannot be created or destroyed, it can only be transferred from one form to another
2) This means for a closed system, total amount of energy remains constant
4
Q
Define Kinetic Energy
A
Energy possessed by an object due to its motion
KE= ½mv²
5
Q
Define Gravitational Potential Energy
A
Energy stored in an object due to its position in a gravitational field
GPE= mgh
6
Q
Define Power
A
Power is the rate of doing work
Unit: J/s = watt(W)
P= W/t
P= Fs/t
P= Fv
