Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 824 · 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.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the same cup of coins (c) the same string (d) how hard we must pull
2. 2.True or false: a crowbar is a lever. (a) False (b) True
3. 3.⚙️ Which of these uses a pulley? (a) a tap handle (b) a slide (c) a crane (d) a crowbar
4. 4.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
5. 5.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
6. 6.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it might sing (d) it is magnetic
7. 7.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) zero (d) double
8. 8.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
9. 9.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) an empty thread reel (d) a magnet
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
12. 12.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
13. 13.⚖️ 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
14. 14.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a balloon (c) turmeric powder (d) an empty thread reel
16. 16.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
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 keep it the same (b) we change it (c) we measure it
18. 18.⚖️ 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
19. 19.⚙️ Which of these is a lever? (a) a ramp (b) a steering wheel (c) a crowbar (d) a tap handle
20. 20.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
21. 21.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
22. 22.🧺 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 mirror (d) string
23. 23.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
24. 24.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) coins as the load (d) a battery cell
26. 26.True or false: a bottle opener is an inclined plane. (a) True (b) False
27. 27.True or false: a doorknob is a wheel and axle. (a) True (b) False
28. 28.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
30. 30.⚖️ 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 change it (c) we measure it
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) a small paper cup (d) string
32. 32.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
33. 33.⚖️ 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
34. 34.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) battery (d) rope
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) number of pulleys (c) the same string (d) the lifting height
36. 36.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
37. 37.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a steering wheel (c) a tap handle (d) a slide
38. 38.⚙️ Which of these is a lever? (a) a well pulley (b) a crane (c) a see-saw (d) a slide
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) string (d) a balloon
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) yeast (d) a pencil

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