Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 59 · 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.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) string (d) yeast
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a magnet (c) coins as the load (d) an empty thread reel
4. 4.⚖️ 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 string
5. 5.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) pulling down is easier (d) the rope gets shorter
6. 6.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) a small paper cup (d) a balloon
8. 8.True or false: a crowbar is an inclined plane. (a) False (b) True
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) turmeric powder (d) string
10. 10.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
11. 11.⚖️ 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) number of pulleys (c) how hard we must pull (d) the same cup of coins
12. 12.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) turmeric powder (d) an empty thread reel
14. 14.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
15. 15.⚖️ 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 change it (b) we measure it (c) we keep it the same
16. 16.True or false: a see-saw is a wheel and axle. (a) False (b) True
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) an empty thread reel (d) a mirror
18. 18.⚖️ 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 keep it the same (c) we measure it
19. 19.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
20. 20.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a crowbar (c) a see-saw (d) a tap handle
21. 21.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
22. 22.⚖️ 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) True (b) False
23. 23.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a doorknob (c) a see-saw (d) a slide
24. 24.⚙️ Which of these uses a pulley? (a) a flagpole (b) a see-saw (c) a spoon lifting a lid (d) a doorknob
25. 25.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) harder (d) easier
26. 26.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
27. 27.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
29. 29.⚖️ 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 measure it (c) we change it
30. 30.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) rope (d) magnet
31. 31.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
32. 32.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
33. 33.⚖️ 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
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) a mirror (d) a small paper cup
35. 35.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
36. 36.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
37. 37.True or false: a tap handle is a wheel and axle. (a) True (b) False
38. 38.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) string (d) yeast
40. 40.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False

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