Work Notes
- 1. Work • Work is done on an object when the object moves in the same direction in which the force is exerted. • If no motion occurs then there will be no work. • Did you do work with your book bag on your back walking to class?
- 2. Calculating Work • Work depends on two things: 1. Force 2. Distance • Which would require more work: 1. Lifting a 50N potted plant .5 m off the ground to a table or a 100N potted plant the same distance.
- 3. Calculating Work • We can find the work it takes to move objects with the following equation. W= Force (F) x Distance (d) • The following unit is used for work: • Joule (J) Now, find how much work it would take to move each of the plotted plants.
- 4. Calculating Work How much work would it take to move a 250 N car a distance of 5m? How much work would it take to lift a 63 N book a distance of 3m?
- 5. Practice Problems 1. Calculate the work done on a wagon if you push it 35m with a force of 53N. 2. Calculate how much force you would need to pull a wagon if you applied 65 J of work and pulled a distance of 25m. 3. Would you be doing work to a box if you carried it to a moving truck? Explain.
- 6. Practice Problems 1. Calculate the work done on a wagon if you push it 35m with a force of 53N. 2. Calculate how much force you would need to pull a wagon if you applied 65 J of work and pulled a distance of 25m. 3. Would you be doing work to a box if you carried it to a moving truck? Explain.