Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 931 · 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 cup of coins is the one thing we change. (a) False (b) True
2. 2.⚖️ 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) number of pulleys (d) the same cup of coins
3. 3.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
4. 4.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
5. 5.⚖️ 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
6. 6.True or false: a slide is a lever. (a) True (b) False
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) a pencil (d) yeast
8. 8.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
9. 9.True or false: a sloping road is a wheel and axle. (a) True (b) False
10. 10.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a doorknob (c) a sloping road (d) a crane
11. 11.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a battery cell (c) a small paper cup (d) coins as the load
13. 13.True or false: a well pulley is an inclined plane. (a) True (b) False
14. 14.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) coins as the load (d) a battery cell
16. 16.⚖️ 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 measure it (b) we change it (c) we keep it the same
17. 17.⚖️ 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
18. 18.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a mirror (c) a small paper cup (d) a pencil
20. 20.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) a balloon (d) a small paper cup
22. 22.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) in a circle (d) up
23. 23.⚖️ 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
24. 24.⚙️ Which of these is a lever? (a) a sloping road (b) a tap handle (c) a crane (d) a bottle opener
25. 25.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
26. 26.True or false: a crane uses a pulley. (a) True (b) False
27. 27.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) water gets lighter (c) the rope gets shorter (d) the bucket floats
28. 28.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets longer (d) it gets wet
29. 29.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a magnet (c) string (d) a pencil
31. 31.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
32. 32.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) battery (d) rope
33. 33.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) the same (d) impossible
34. 34.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) an empty thread reel (c) string (d) coins as the load
36. 36.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
37. 37.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
38. 38.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
39. 39.True or false: a sloping road uses a pulley. (a) True (b) False
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) a balloon (d) a magnet

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