1. Chapter 4:
Work it
Power
Rangers
Go cry to
MA
It’s only
machine
wastelan
d
KISS
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4
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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?