Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 391 · 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 small paper cup (b) a magnet (c) a mirror (d) a balloon
2. 2.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
3. 3.⚖️ 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
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 keep it the same (b) we measure it (c) we change it
5. 5.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
6. 6.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
7. 7.⚙️ Which of these is a lever? (a) a steering wheel (b) a crane (c) a bottle opener (d) a tap handle
8. 8.⚖️ 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 lifting height
9. 9.⚖️ 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
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a mirror (d) an empty thread reel
11. 11.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a see-saw (c) a crowbar (d) a crane
12. 12.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
13. 13.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) battery (d) nail
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) the same string (c) how hard we must pull (d) number of pulleys
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) an empty thread reel (c) a mirror (d) turmeric powder
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
17. 17.⚖️ 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
18. 18.⚙️ Which of these uses a pulley? (a) a see-saw (b) a crowbar (c) a doorknob (d) a well pulley
19. 19.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
20. 20.True or false: a see-saw is a wheel and axle. (a) False (b) True
21. 21.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
22. 22.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
23. 23.⚖️ 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 string (b) number of pulleys (c) the lifting height (d) the same cup of coins
24. 24.⚖️ 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
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
26. 26.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
27. 27.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
28. 28.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
29. 29.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it turns blue (d) it can hurt your finger
30. 30.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
31. 31.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) makes it magnetic (d) adds weight
32. 32.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
33. 33.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
34. 34.True or false: a crowbar is a lever. (a) False (b) True
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) turmeric powder (d) a pencil
36. 36.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a crane (c) a flagpole (d) a spoon lifting a lid
37. 37.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
38. 38.⚙️ Which of these is a lever? (a) a crowbar (b) a flagpole (c) a tap handle (d) a ramp
39. 39.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
40. 40.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle

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