Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 52 · 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? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) string (d) a mirror
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) string (d) a battery cell
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) string (d) a magnet
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) yeast (c) a small paper cup (d) string
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) a balloon (d) yeast
8. 8.🛟 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
9. 9.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
10. 10.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
11. 11.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
12. 12.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) double (d) zero
14. 14.True or false: a doorknob uses a pulley. (a) True (b) False
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) coins as the load (d) a balloon
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) an empty thread reel (d) a small paper cup
17. 17.⚖️ 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) the same cup of coins (c) the same string (d) number of pulleys
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) yeast (c) coins as the load (d) turmeric powder
19. 19.🧺 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) a pencil
20. 20.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
21. 21.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a sloping road (c) a spoon lifting a lid (d) a tap handle
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
23. 23.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a spoon lifting a lid (c) a crane (d) a slide
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) True (b) False
25. 25.⚖️ 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 keep it the same (c) we change it
26. 26.True or false: a slide is a lever. (a) True (b) False
27. 27.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
28. 28.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
30. 30.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
31. 31.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
32. 32.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the rope gets shorter (c) water gets lighter (d) the bucket floats
33. 33.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
34. 34.⚖️ 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
35. 35.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
36. 36.🧺 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
37. 37.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it turns blue (d) it gets wet
38. 38.True or false: a flagpole is a wheel and axle. (a) False (b) True
39. 39.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
40. 40.True or false: a sloping road is an inclined plane. (a) True (b) False

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