Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 502 · 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) a balloon (b) a pencil (c) a battery cell (d) a mirror
2. 2.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
3. 3.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) up (d) down
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 measure it (b) we keep it the same (c) we change it
5. 5.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) turmeric powder (c) coins as the load (d) an empty thread reel
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the same cup of coins
7. 7.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
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 string (c) number of pulleys (d) how hard we must pull
9. 9.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
10. 10.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
11. 11.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
12. 12.True or false: a crowbar uses a pulley. (a) False (b) True
13. 13.True or false: a crowbar is a lever. (a) True (b) False
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) the lifting height (c) how hard we must pull
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) string (d) an empty thread reel
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) an empty thread reel (c) a small paper cup (d) coins as the load
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) a mirror (d) string
18. 18.⚖️ 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
19. 19.⚖️ 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 measure it (c) we keep it the same
20. 20.⚖️ 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
21. 21.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets wet (d) it gets longer
22. 22.True or false: a small paper cup is 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? What do we do with “the same cup of coins”? (a) we keep it the same (b) we measure it (c) we change it
24. 24.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
25. 25.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) nail (d) magnet
26. 26.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) an empty thread reel (d) a battery cell
28. 28.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 10 cm (d) 5 cm
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) True (b) False
31. 31.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
32. 32.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a ramp (c) a sloping road (d) a slide
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) yeast (d) a pencil
35. 35.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
36. 36.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
37. 37.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
38. 38.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a bottle opener (c) a see-saw (d) a crowbar
39. 39.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it might sing (d) it could fall on you
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) a balloon (d) coins as the load

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