Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 809 · 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.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a magnet (c) a mirror (d) yeast
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) number of pulleys (c) how hard we must pull (d) the same string
3. 3.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) battery (d) nail
4. 4.⚖️ 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 change it (c) we measure it
5. 5.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 10 cm (d) 5 cm
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a magnet (c) string (d) a small paper cup
7. 7.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
8. 8.True or false: a crowbar is a lever. (a) False (b) True
9. 9.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
10. 10.True or false: a steering wheel is a wheel and axle. (a) True (b) False
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) turmeric powder (c) a pencil (d) coins as the load
12. 12.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a doorknob (c) a crane (d) a flagpole
13. 13.🧺 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
14. 14.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
15. 15.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
16. 16.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a steering wheel (c) a ramp (d) a well pulley
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) an empty thread reel (d) yeast
18. 18.⚙️ Which of these is a lever? (a) a well pulley (b) a doorknob (c) a slide (d) a spoon lifting a lid
19. 19.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) yeast (c) turmeric powder (d) a balloon
21. 21.⚖️ 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) False (b) True
22. 22.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
23. 23.⚖️ 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
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) how hard we must pull (c) the same cup of coins (d) the lifting height
25. 25.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
26. 26.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
27. 27.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the bench (c) on the blackboard (d) in the tap
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) a balloon (d) an empty thread reel
29. 29.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
30. 30.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
31. 31.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) turmeric powder (d) a pencil
33. 33.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
34. 34.⚖️ 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 change it (b) we keep it the same (c) we measure it
35. 35.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
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.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
38. 38.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
39. 39.⚙️ Which of these uses a pulley? (a) a ramp (b) a crowbar (c) a see-saw (d) a flagpole
40. 40.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False

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