This document appears to be notes from lessons on machines and mechanical advantage. It includes: 1. Definitions and examples of simple machines like inclined planes, screws, levers, and pulleys. 2. Concepts related to work, efficiency, and power calculations. Formulas and examples of calculating work, efficiency of machines, and power are provided. 3. Explanations of mechanical advantage and how it relates to the efficiency of machines. Examples are given of calculating mechanical advantage.

1. Chapter 4:
Work it
Power
Rangers
Go cry to
MA
It’s only
machine
wastelan
d
KISS
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2. KISS 4
• A _____________ is a lever that rotates.

3. KISS 3
• A seesaw is a _______ class lever that has an
MA of _____

4. It’s Only Machine Wasteland 2
• A machine that requires 200 Joules of work
and puts out 50 Joules of work is how
efficient?

5. It’s Only Machine Wasteland 1
• According to the current laws of physics, cars
in the future may have 100% efficiency.

6. Go Cry to MA 3
• If you apply 100 N of force to a machine and
the machine exerts 400 N on the object, what
is the MA of the machine?

7. Go Cry to MA 2
• What 3 things can machines do to make work
easier?

8. Go Cry to MA 1
• A machine’s actual MA is always greater than
its ideal MA. (T/F?)

9. Power Rangers 1
• Equation, Units and definition of Power

10. Kiss 5
• To increase an inclined plane’s actual MA,
you______________

11. KISS 2
• A______________ is a cutting tool made from
a moving inclined plane.

12. Power Rangers 2
• If you apply a force of 100 N for 5 m and
spend 2 minutes doing it, you use ___ ___ of
power.

13. KISS 1
• A______________is an inclined plane
wrapped around a cylinder.

14. Work it 3
• Lifting a 2 kg object 3m up requires how many
Joules of energy

15. Work it 4
• The thumbtacks holding up the posters up in
this room are doing a very small amount of
work T/F?

16. Wasteland 2
• A machine that requires 200 J of work and
puts out 50 J of work is how efficient?

17. Power rangers 3
• Doing a certain amount of work in less time
means you use less power T/F?

18. 1 pt: Work it
• Equation, Definition and Units for Work

19. 2 pts: work it
• If you push a 3,000 N piano sideways a
distance of 2 m, how much work was done?

20. Wasteland 3
• Describe one way to make a pulley system
more efficient.

21. Go cry to MA 4
• A machine with a mechanical advantage
between what two numbers will multiply
distance?