Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 317 · 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) the same (c) zero (d) double
2. 2.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
3. 3.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it gets wet (d) it can hurt your finger
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a pencil (d) a mirror
5. 5.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
6. 6.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
7. 7.⚖️ 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 keep it the same (c) we measure it
8. 8.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
10. 10.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
11. 11.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
12. 12.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
13. 13.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) the same string (c) number of pulleys
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) coins as the load (d) a balloon
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
17. 17.⚖️ 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 change it (c) we keep it the same
18. 18.True or false: a flagpole is an inclined plane. (a) False (b) True
19. 19.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
20. 20.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) coins as the load (c) a magnet (d) yeast
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a magnet (c) a pencil (d) string
23. 23.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) rope (d) battery
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) an empty thread reel (d) yeast
25. 25.⚙️ Which of these uses a pulley? (a) a well pulley (b) a crowbar (c) a slide (d) a spoon lifting a lid
26. 26.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) yeast (d) a balloon
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
29. 29.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) a mirror (d) an empty thread reel
30. 30.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
31. 31.True or false: a magnet is not needed for the thread-reel pulley. (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.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a sloping road (c) a crowbar (d) a crane
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a battery cell (d) a small paper cup
35. 35.🛟 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
36. 36.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) adds weight (d) halves the weight
37. 37.⚙️ Which of these is a lever? (a) a see-saw (b) a tap handle (c) a well pulley (d) a steering wheel
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same cup of coins (b) number of pulleys (c) the same string (d) how hard we must pull
39. 39.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
40. 40.⚖️ 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) number of pulleys (c) how hard we must pull (d) the same string

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