Directions: Use the Simple Machines – Levers slide show to complete the guided notes. 1. Simples Machines are Mechanisms that manipulate magnitude of and .

2. The six simple machines are the

3. Mechanical Advantage (MA) is the

1.

2.

4. A mechanical advantage of 2:1 tells us what about a mechanism?

Effort force magnitude is times less than the magnitude of the resistance force.

Effort force travels times greater distance than the resistance force.

5. The force applied on an object times distance the object travels parallel to the force is known as .

6
.

Work = x = F · d║
7. If MA is greater than 1:
⦁ Proportionally effort force is required to overcome the resistance force
⦁ Proportionally effort distance is required to overcome the resistance force
If MA is less than 1:
⦁ Proportionally effort force is required to overcome the resistance force
⦁ Proportionally effort distance is required to overcome the resistance force

8. MA be less than or equal to zero.

9. What is the formula for Ideal Mechanical Advantage? Be sure to write down what the variables are.

10. IMA
1. Used in efficiency and safety factor design calculations

2. Theory-based calculation

3.

4.

11. What is the formula for Actual Mechanical Advantage? Be sure to write down what the variables are.

12. AMA
1. Inquiry-based calculation

2. Frictional losses are taken into consideration

3.

4.

13. Complete the table below. Be sure to label the fulcrum, effort, and resistance.
1st class lever 2nd class lever 3rd class lever

14. is the The turning effect of a force about a point equal to the magnitude of the force times the perpendicular distance from the point to the line of action from the force.

15. is the force that produces or tends to produce rotation or torsion.

16. On the diagram to the right label the Distance Resistance (DR), Distance Effort (DE), Effort Force (FE), and Effort Resistance (FR)

17. Calculate the effort moment acting on the lever.

Formula Substitution Answer

18. Calculate the unknown distance (DR) from the fulcrum to the resistance force.

Formula

Substitution Answer

19.In the example above what is the AMA, IMA, and Efficiency?

Formula Substitution Answer
AMA

IMA

Efficiency

20. Why isn’t any machine 100% efficient?