Pulley STEM Project Worksheet

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

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