Work and Machines



1. A _______ _______ _____is used to increase the distance moved, not to decrease the force.

2. _________is another name for joules per second.

3. _______ ______ is the name for the force applied to a lever.

4. The __________is the part of a lever that does not move.

5. _________ involves movement and force.

6. A ________ ________ is when a machine reduces the force used to move an object.

7. _________ is the SI unit for force.

8. __________ is the SI unit for work.

9. The ______ is the SI unit for distance.

10. _________ is the rate at which work is done.

11. The ___________ _______ is the weight of the object being lifted by a lever.

12. The _________ _____ is the length of the lever between the fulcrum and the resistance force.

13. The _________ _____ is the length of the from the fulcrum to where the effort force is applied.

14. A _______ _____ ________ is a combination of pulleys used to lift heavy objects such as a piano or an automobile engine.

15. A ________ _______ ______ is a lever in which the fulcrum is between the two forces.

16. A _________ is anything which changes the size or direction of forces used to do work.

17. __________ causes work input to always be greater than work output.

18. __________ is calculated by dividing work output by work input.

19. A _______ is an inclined plane that twists.

20. A ________ is an inclined plane that is thick at one end and thin at the other.

21. A rake is an example of a _________ class lever.

22. A wheelbarrow is a _________ machine.

23. If you exert force and no movement occurs, has work been done?

24. A kilojoule is equal to ________ joules.

25. A megajoule is equal to _________ joules.

26. A mechanical advantage of 2 allows you to apply _______ the force needed to move an object without a machine.

27. Work ____put is always greater than work _____put.

28. A crowbar is an example of a ________ class lever.

29. A wheelbarrow is an example of a ________ class lever.

30. A _________ machine is made up of two or more simple machines.

Work and Machines Notes
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