Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 275 · 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: the same string is kept the same. (a) True (b) False
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) a small paper cup (d) a mirror
3. 3.⚙️ Which simple machine is a crowbar? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
4. 4.True or false: a slide is an inclined plane. (a) True (b) False
5. 5.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) makes it magnetic (c) adds weight (d) halves the weight
6. 6.⚙️ Which of these is a wheel and axle? (a) a crane (b) a spoon lifting a lid (c) a steering wheel (d) a crowbar
7. 7.True or false: a tap handle is a wheel and axle. (a) True (b) False
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a battery cell (c) string (d) an empty thread reel
9. 9.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
10. 10.🧺 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 battery cell
11. 11.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it is magnetic (d) it gets hot
12. 12.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
14. 14.🔮 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
15. 15.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) a battery cell (d) an empty thread reel
17. 17.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) easier (d) impossible
18. 18.True or false: string is needed for the thread-reel pulley. (a) False (b) True
19. 19.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) battery (d) rope
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a balloon (c) string (d) a small paper cup
21. 21.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
22. 22.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the flagpole (d) on the bench
23. 23.⚙️ Which of these uses a pulley? (a) a crane (b) a spoon lifting a lid (c) a ramp (d) a see-saw
24. 24.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
25. 25.⚖️ 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 change it (c) we keep it the same
26. 26.⚖️ 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
27. 27.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
28. 28.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
29. 29.⚙️ Which simple machine is a flagpole? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
30. 30.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) a pencil (d) a balloon
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) an empty thread reel (d) yeast
33. 33.True or false: a crane uses a pulley. (a) False (b) True
34. 34.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a crowbar (c) a see-saw (d) a slide
35. 35.⚖️ 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
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
37. 37.True or false: a bottle opener is a wheel and axle. (a) False (b) True
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a magnet (d) string
39. 39.True or false: a flagpole is an inclined plane. (a) True (b) False
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) string (c) an empty thread reel (d) a pencil

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