Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 587 · 40 questions

What you do (Pull down, lift up): 1. Push the pencil through the thread reel; an adult holds the pencil ends level. 2. Tie the paper cup to one end of the string and lay the string over the reel. 3. Put coins in the cup and pull the other end down. 4. Feel how hard you pull; never stand under the load or wrap string round your fingers.

1. 1.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
2. 2.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) impossible (d) easier
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) False (b) True
4. 4.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a crowbar (c) a doorknob (d) a ramp
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) a battery cell (d) coins as the load
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a battery cell (d) a pencil
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the lifting height
8. 8.⚙️ Which of these is a lever? (a) a well pulley (b) a crowbar (c) a doorknob (d) a slide
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
10. 10.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) the same cup of coins (c) how hard we must pull
12. 12.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same cup of coins”? (a) we measure it (b) we change it (c) we keep it the same
14. 14.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
15. 15.⚙️ Which simple machine is a tap handle? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) a small paper cup (d) string
17. 17.⚙️ Which of these is a lever? (a) a well pulley (b) a bottle opener (c) a ramp (d) a doorknob
18. 18.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) a pencil (d) yeast
20. 20.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
21. 21.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the rope gets shorter (d) the bucket floats
22. 22.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
23. 23.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
27. 27.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
28. 28.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it is magnetic (d) it could fall on you
29. 29.True or false: a bottle opener is a lever. (a) True (b) False
30. 30.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
31. 31.⚙️ Which of these is a lever? (a) a flagpole (b) a ramp (c) a spoon lifting a lid (d) a tap handle
32. 32.True or false: a crowbar is a lever. (a) True (b) False
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
34. 34.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) battery (d) rope
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) string (d) a mirror
36. 36.True or false: a well pulley is an inclined plane. (a) True (b) False
37. 37.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
38. 38.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
39. 39.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 10 cm (d) 5 cm
40. 40.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True

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