Pulley STEM Project Worksheet

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

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