1. Force & Work Notes
TEKS 6.8E investigate how inclined planes and pulleys can be used to change the amount of force to move an object
TEKS 7.7A contrast situations where work is done with different amounts of force to situations where no work is done such as moving a box with a ramp and without a ramp, or standing still

2. How do you know when work is done?
Essential Question
How do you know when work is done?

3. A force is any push or pull on an object.

4. When a force is exerted that moves an object you do
work.

5. The force must be in the same direction as the object’s motion.

6. No work is done when…
…the force on the object is not able to move the object, so there is no motion.
…the movement and the force are not in the same direction.

7. Calculating Work
Essential Question – How do you know the amount of work being done?

8. The unit of measurement for work is
Joules.

9. The unit of measurement for force is
Newtons.

10. The tool used to measure weight or force is a
spring scale.

11. W = F X d Work = Force X distance
Work can be calculated using the following formula:
W = F X d Work = Force X distance

12. How much work is done if a force of 20 Newtons moves a box 4 meters?

13. 20N
4 m
W = F X d
W = 20N X 4m
W = 80 Joules