Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 844 · 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.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
2. 2.True or false: a flagpole uses a pulley. (a) False (b) True
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a magnet (d) a pencil
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) coins as the load (d) turmeric powder
5. 5.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
6. 6.🔮 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
7. 7.⚖️ 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) the same cup of coins (c) how hard we must pull (d) number of pulleys
8. 8.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
9. 9.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
10. 10.True or false: a tap handle 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) a balloon (b) a pencil (c) a small paper cup (d) string
12. 12.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a small paper cup (d) a balloon
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) a pencil (c) an empty thread reel (d) string
15. 15.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets longer (d) it gets wet
16. 16.🧺 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) a small paper cup
17. 17.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
20. 20.⚖️ 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
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
22. 22.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
23. 23.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) pulling down is easier (d) water gets lighter
24. 24.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
25. 25.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
26. 26.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
27. 27.⚖️ 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
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we keep it the same (c) we measure it
29. 29.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
30. 30.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
31. 31.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) rope (d) battery
32. 32.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
33. 33.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) sideways (d) down
34. 34.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) a pencil (d) a mirror
36. 36.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
37. 37.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
38. 38.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) makes it magnetic (d) changes pull direction
39. 39.🧺 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) yeast (d) a pencil
40. 40.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever

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