Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 302 · 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? True or false: the same string is the one thing we change. (a) True (b) False
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a small paper cup (d) a battery cell
3. 3.True or false: a slide is a wheel and axle. (a) False (b) True
4. 4.True or false: a doorknob is a wheel and axle. (a) False (b) True
5. 5.⚖️ 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) how hard we must pull (d) the same string
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a mirror (d) yeast
7. 7.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
8. 8.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
9. 9.⚖️ 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 measure it (c) we change it
10. 10.True or false: a tap handle is a wheel and axle. (a) False (b) True
11. 11.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it turns blue (d) it gets longer
12. 12.True or false: a flagpole uses a pulley. (a) False (b) True
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a small paper cup (d) string
14. 14.True or false: a steering wheel is a wheel and axle. (a) False (b) True
15. 15.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) harder (d) impossible
16. 16.⚙️ Which of these uses a pulley? (a) a doorknob (b) a ramp (c) a sloping road (d) a flagpole
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) an empty thread reel (d) yeast
18. 18.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
19. 19.⚖️ 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) how hard we must pull (c) the same string (d) number of pulleys
20. 20.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) water gets lighter (c) the bucket floats (d) the rope gets shorter
21. 21.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
22. 22.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
23. 23.True or false: a slide uses a pulley. (a) False (b) True
24. 24.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
25. 25.⚙️ Which simple machine is a slide? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) a battery cell (d) coins as the load
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a pencil (d) a magnet
29. 29.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
30. 30.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) magnet (d) rope
31. 31.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) changes pull direction (d) halves the weight
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) a magnet (d) a small paper cup
33. 33.🧺 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) a balloon
34. 34.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
35. 35.True or false: a well pulley is a wheel and axle. (a) True (b) False
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) False (b) True
37. 37.True or false: a ramp is an inclined plane. (a) True (b) False
38. 38.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
39. 39.⚖️ 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
40. 40.🧺 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 small paper cup (d) a mirror

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