Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 319 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a magnet (c) coins as the load (d) an empty thread reel
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) yeast (d) a mirror
3. 3.⚖️ 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) how hard we must pull (d) the lifting height
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) a mirror (d) a pencil
5. 5.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) magnet (d) nail
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
7. 7.⚖️ 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
8. 8.🛟 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
9. 9.True or false: a spoon lifting a lid is a lever. (a) False (b) True
10. 10.⚙️ Which of these is a lever? (a) a see-saw (b) a crane (c) a tap handle (d) a steering wheel
11. 11.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
12. 12.True or false: a steering wheel is a wheel and axle. (a) False (b) True
13. 13.⚙️ Which simple machine is a slide? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
14. 14.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
15. 15.⚖️ 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
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True
17. 17.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
18. 18.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
19. 19.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) adds weight (c) makes it magnetic (d) halves the weight
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
21. 21.True or false: string is needed for the thread-reel pulley. (a) True (b) False
22. 22.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) harder (d) impossible
23. 23.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) a pencil (c) string (d) an empty thread reel
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we keep it the same (c) we change it
25. 25.⚖️ 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
26. 26.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
27. 27.True or false: a sloping road is an inclined plane. (a) False (b) True
28. 28.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) string (c) a mirror (d) a battery cell
30. 30.⚖️ 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) True (b) False
31. 31.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
32. 32.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) coins as the load (c) a small paper cup (d) turmeric powder
34. 34.⚖️ 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
35. 35.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
36. 36.⚖️ 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 lifting height (d) the same string
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a battery cell (c) string (d) a small paper cup
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) turmeric powder (c) a pencil (d) string
39. 39.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
40. 40.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed

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