Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 673 · 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.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 5 cm (d) 20 cm
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
5. 5.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) a pencil (d) coins as the load
7. 7.True or false: a flagpole is an inclined plane. (a) False (b) True
8. 8.⚖️ 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
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a pencil (c) a balloon (d) yeast
10. 10.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
11. 11.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) makes it magnetic (d) halves the weight
12. 12.True or false: a ramp is a wheel and axle. (a) True (b) False
13. 13.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it can hurt your finger (d) it turns blue
14. 14.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
15. 15.⚖️ 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
16. 16.⚖️ 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) number of pulleys (c) the same string (d) the same cup of coins
17. 17.🧺 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
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) turmeric powder (c) a magnet (d) a balloon
19. 19.⚖️ 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 measure it (b) we keep it the same (c) we change it
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) a small paper cup (c) coins as the load (d) string
21. 21.⚖️ 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
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) a battery cell (d) an empty thread reel
23. 23.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a doorknob (c) a crowbar (d) a flagpole
24. 24.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
25. 25.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
26. 26.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
27. 27.🧺 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) coins as the load
28. 28.True or false: a well pulley is an inclined plane. (a) False (b) True
29. 29.⚖️ 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
30. 30.⚙️ Which of these is a lever? (a) a steering wheel (b) a tap handle (c) a ramp (d) a bottle opener
31. 31.True or false: a slide is a wheel and axle. (a) True (b) False
32. 32.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
33. 33.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
34. 34.True or false: string is needed for the thread-reel pulley. (a) True (b) False
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we measure it (c) we change it
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) an empty thread reel (d) a battery cell
37. 37.⚖️ 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
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
39. 39.⚖️ 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) False (b) True
40. 40.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True

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