Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 841 · 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.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
2. 2.⚖️ 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
3. 3.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) a balloon (d) a mirror
5. 5.🧺 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) coins as the load
6. 6.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 40 cm (d) 10 cm
7. 7.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
8. 8.⚖️ 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 measure it (c) we keep it the same
9. 9.⚙️ Which of these is a lever? (a) a sloping road (b) a bottle opener (c) a tap handle (d) a well pulley
10. 10.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
11. 11.⚖️ 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 change it (b) we measure it (c) we keep it the same
12. 12.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
14. 14.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
15. 15.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a tap handle (c) a flagpole (d) a sloping road
16. 16.True or false: string is needed for the thread-reel pulley. (a) True (b) False
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) yeast (d) a small paper cup
18. 18.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a well pulley (c) a slide (d) a tap handle
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) turmeric powder (d) a battery cell
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) string (c) turmeric powder (d) a magnet
21. 21.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
23. 23.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it gets wet (d) it turns blue
24. 24.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
25. 25.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) coins as the load (c) a pencil (d) an empty thread reel
27. 27.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
28. 28.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
29. 29.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
30. 30.⚙️ Which of these uses a pulley? (a) a slide (b) a spoon lifting a lid (c) a flagpole (d) a crowbar
31. 31.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) adds weight (d) changes pull direction
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) turmeric powder (c) a small paper cup (d) coins as the load
34. 34.⚖️ 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 same cup of coins
35. 35.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
36. 36.True or false: a see-saw is a lever. (a) False (b) True
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) an empty thread reel (d) a balloon
38. 38.⚖️ 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 measure it (b) we keep it the same (c) we change it
39. 39.True or false: a flagpole uses a pulley. (a) False (b) True
40. 40.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) magnet (d) nail

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