Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 913 · 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.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) number of pulleys (c) the same cup of coins (d) how hard we must pull
4. 4.True or false: a well pulley uses a pulley. (a) True (b) False
5. 5.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a pencil (c) a small paper cup (d) an empty thread reel
6. 6.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we change it (b) we measure it (c) we keep it the same
8. 8.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) an empty thread reel (c) a small paper cup (d) string
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
11. 11.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it can hurt your finger (d) it gets longer
12. 12.⚖️ 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
13. 13.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
15. 15.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
16. 16.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) nail (d) rope
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a pencil (c) a small paper cup (d) an empty thread reel
18. 18.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
19. 19.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) a magnet (d) coins as the load
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
23. 23.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
24. 24.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
26. 26.⚙️ Which of these is a lever? (a) a crane (b) a see-saw (c) a sloping road (d) a tap handle
27. 27.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) how hard we must pull (c) the same string (d) the lifting height
29. 29.True or false: a crane is a lever. (a) False (b) True
30. 30.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
31. 31.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) in a circle (d) up
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) turmeric powder (d) string
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a battery cell (d) coins as the load
34. 34.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
35. 35.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it gets hot (d) it might sing
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) an empty thread reel (d) yeast
37. 37.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
38. 38.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
39. 39.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
40. 40.⚖️ 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

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