Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 911 · 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? Which of these is kept the same? (a) the same string (b) how hard we must pull (c) number of pulleys
2. 2.⚖️ 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 lifting height (c) how hard we must pull
3. 3.⚖️ 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 keep it the same (c) we measure it
4. 4.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
5. 5.🧺 Do we need turmeric powder 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) yeast (b) a small paper cup (c) a pencil (d) string
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) turmeric powder (c) coins as the load (d) a small paper cup
8. 8.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
9. 9.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
10. 10.True or false: a well pulley is a lever. (a) True (b) False
11. 11.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) magnet (d) nail
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a pencil (c) yeast (d) a balloon
13. 13.True or false: a steering wheel is a lever. (a) True (b) False
14. 14.⚖️ 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
15. 15.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the flagpole (d) on the blackboard
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
17. 17.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
18. 18.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a small paper cup (d) a magnet
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the same string (c) the lifting height (d) how hard we must pull
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
22. 22.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
23. 23.⚖️ 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
24. 24.⚙️ Which of these is a lever? (a) a crowbar (b) a sloping road (c) a crane (d) a ramp
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a balloon (c) coins as the load (d) a small paper cup
26. 26.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
27. 27.True or false: a slide is an inclined plane. (a) True (b) False
28. 28.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
29. 29.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) coins as the load (d) turmeric powder
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a battery cell (c) coins as the load (d) an empty thread reel
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) yeast (c) a mirror (d) a magnet
33. 33.True or false: a doorknob is a wheel and axle. (a) True (b) False
34. 34.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) adds weight (d) makes it magnetic
35. 35.True or false: a doorknob uses a pulley. (a) False (b) True
36. 36.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
37. 37.True or false: a bottle opener is a lever. (a) False (b) True
38. 38.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
39. 39.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
40. 40.⚙️ Which simple machine is a crowbar? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane

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