Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 925 · 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? What do we do with “the same cup of coins”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
3. 3.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) an empty thread reel (d) yeast
5. 5.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) turmeric powder (d) a pencil
7. 7.⚙️ Which of these is a lever? (a) a flagpole (b) a slide (c) a well pulley (d) a bottle opener
8. 8.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) easier (d) the same
9. 9.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
10. 10.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a crowbar (c) a sloping road (d) a see-saw
11. 11.⚖️ 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
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same
13. 13.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
15. 15.True or false: a steering wheel is a wheel and axle. (a) False (b) True
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) False (b) True
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) a magnet (d) a small paper cup
18. 18.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight
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.True or false: a doorknob is a wheel and axle. (a) False (b) True
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a pencil (c) an empty thread reel (d) a small paper cup
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) an empty thread reel (d) a balloon
23. 23.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
24. 24.⚖️ 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
25. 25.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
26. 26.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a crowbar (c) a crane (d) a see-saw
27. 27.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) turmeric powder (d) yeast
29. 29.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
30. 30.⚙️ Which of these is a lever? (a) a see-saw (b) a crane (c) a ramp (d) a tap handle
31. 31.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
32. 32.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) string (c) yeast (d) a battery cell
34. 34.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
35. 35.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) pulling down is easier (d) water gets lighter
36. 36.🛟 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
37. 37.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) magnet (d) rope
38. 38.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a crowbar (c) a sloping road (d) a bottle opener
39. 39.True or false: a mirror 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 the one thing we change? (a) the lifting height (b) the same string (c) how hard we must pull (d) number of pulleys

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