Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 934 · 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 the one thing we change? (a) how hard we must pull (b) the same string (c) the lifting height (d) number of pulleys
2. 2.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
4. 4.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
5. 5.🧺 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) yeast (d) string
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) number of pulleys (c) the lifting height (d) the same string
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) turmeric powder (c) string (d) an empty thread reel
8. 8.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) battery (d) rope
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a mirror (c) a pencil (d) coins as the load
11. 11.True or false: a bottle opener is a lever. (a) True (b) False
12. 12.⚖️ 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
13. 13.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) pulling down is easier (c) water gets lighter (d) the bucket floats
14. 14.True or false: a tap handle uses a pulley. (a) False (b) True
15. 15.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
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.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a mirror (c) coins as the load (d) a battery cell
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) an empty thread reel (d) a balloon
19. 19.True or false: a crowbar is an inclined plane. (a) False (b) True
20. 20.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
21. 21.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
22. 22.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a crane (c) a crowbar (d) a sloping road
23. 23.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
24. 24.⚙️ Which of these is a lever? (a) a tap handle (b) a see-saw (c) a steering wheel (d) a crane
25. 25.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it is magnetic (d) it might sing
26. 26.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
27. 27.⚖️ 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
28. 28.True or false: a sloping road is an inclined plane. (a) False (b) True
29. 29.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
30. 30.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a flagpole (c) a crowbar (d) a spoon lifting a lid
31. 31.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) adds weight (d) makes it magnetic
32. 32.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
33. 33.⚖️ 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) True (b) False
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a balloon (d) a pencil
35. 35.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) string (c) a magnet (d) yeast
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) an empty thread reel (d) turmeric powder
38. 38.⚖️ 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
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) an empty thread reel (d) a mirror
40. 40.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed

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