1.Work is a + or -
2. Direction of d can be + or - for w
3. F in same direction as d is + for w
4. F opposed to the direction of d is - for w
Work= Force×Displacement or Fd
Work= (20N)(7m)
Or
Work= 140Nm= 140 J
In this example: A 20N force is applied to a table to move 7 meters.
Person 🏃 pushes a table 7 meters------- with force...think of a linemen in football
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Nm(Newton metre) is a unit of torque...think of a tire in motion on it's axle
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J (Joule) or watt second
A unit of electrical energy = to "work" done within 1 second due to it's durability through resistance after a current of 1 "ampere" passes through one "ohm"
