Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 438 · 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 what we measure? (a) the same cup of coins (b) how hard we must pull (c) the same string (d) the lifting height
2. 2.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it could fall on you (d) it is magnetic
3. 3.⚖️ 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) True (b) False
4. 4.⚖️ 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 change it (b) we keep it the same (c) we measure it
5. 5.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a mirror (c) string (d) coins as the load
6. 6.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
7. 7.True or false: a spoon lifting a lid is a lever. (a) True (b) False
8. 8.⚖️ 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) True (b) False
9. 9.🧺 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) coins as the load (d) string
10. 10.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) the rope gets shorter (d) pulling down is easier
11. 11.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) nail (d) rope
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) a magnet (d) an empty thread reel
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) the same (d) double
14. 14.🛟 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
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) coins as the load (d) yeast
16. 16.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
17. 17.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) an empty thread reel (d) turmeric powder
19. 19.🧺 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) a balloon
20. 20.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
21. 21.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
22. 22.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
23. 23.True or false: a slide is a wheel and axle. (a) True (b) False
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a mirror (d) a small paper cup
25. 25.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a well pulley (c) a flagpole (d) a ramp
26. 26.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 10 cm (d) 40 cm
27. 27.True or false: a steering wheel is a wheel and axle. (a) False (b) True
28. 28.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
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 keep it the same (b) we measure it (c) we change it
30. 30.True or false: a tap handle is an inclined plane. (a) True (b) False
31. 31.⚖️ 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) the same string (c) the same cup of coins (d) number of pulleys
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) a magnet (d) coins as the load
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) a small paper cup (d) a battery cell
34. 34.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
35. 35.True or false: a crane uses a pulley. (a) False (b) True
36. 36.⚖️ 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
37. 37.True or false: a flagpole is a wheel and axle. (a) False (b) True
38. 38.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight
39. 39.⚖️ 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
40. 40.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder

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