Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 866 · 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.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
2. 2.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a ramp (c) a slide (d) a crane
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.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) easier (d) harder
5. 5.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
6. 6.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
7. 7.True or false: a crowbar uses a pulley. (a) True (b) False
8. 8.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a crane (c) a slide (d) a well pulley
9. 9.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
10. 10.True or false: a doorknob is a wheel and axle. (a) True (b) False
11. 11.⚖️ 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
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) a small paper cup (d) a balloon
13. 13.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) battery (d) nail
14. 14.⚖️ 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
15. 15.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) the lifting height (c) the same cup of coins (d) how hard we must pull
17. 17.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
18. 18.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
19. 19.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
20. 20.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) how hard we must pull (c) the same string (d) number of pulleys
22. 22.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it is magnetic (d) it might sing
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) yeast (d) turmeric powder
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) coins as the load (c) a pencil (d) an empty thread reel
25. 25.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a magnet (d) a small paper cup
27. 27.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
28. 28.⚖️ 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 same cup of coins (c) how hard we must pull
29. 29.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a sloping road (c) a well pulley (d) a tap handle
30. 30.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) a small paper cup (d) an empty thread reel
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) yeast (d) a pencil
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) string (d) a mirror
34. 34.True or false: a tap handle is a wheel and axle. (a) False (b) True
35. 35.⚙️ Which of these uses a pulley? (a) a slide (b) a see-saw (c) a well pulley (d) a crowbar
36. 36.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
37. 37.⚙️ Which simple machine is a well pulley? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) string (c) an empty thread reel (d) coins as the load
39. 39.⚖️ 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
40. 40.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane

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