Work
by noura alnaqbi
1. Quantity:
1.1. Scalar quantity
1.2. It is always positive or equal to zero
2. Note:
2.1. If the displacement is perpendicular to the force, there is no work
3. Net Work:
4. Definition:
4.1. The energy transferred to or from an object as the result of the action of a force
4.2. Positive work: transfer of energy TO the object
4.3. Negative work: transfer of energy FROM the object
5. Formula:
5.1. W = F . d = Fxd cos @
6. Unit:
6.1. Joules (J)