Work

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)