Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 893 · 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) how hard we must pull (b) number of pulleys (c) the lifting height (d) the same string
2. 2.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the same cup of coins (c) number of pulleys (d) the lifting height
4. 4.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
5. 5.⚖️ 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) False (b) True
6. 6.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) yeast (c) an empty thread reel (d) string
8. 8.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) pulling down is easier (d) water gets lighter
9. 9.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
10. 10.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) rope (d) battery
11. 11.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets wet (d) it gets longer
12. 12.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 40 cm (d) 10 cm
13. 13.True or false: a steering wheel is a lever. (a) False (b) True
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a battery cell (d) a pencil
15. 15.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) yeast (d) a balloon
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
18. 18.⚖️ 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
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) a battery cell (d) string
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) an empty thread reel (d) a mirror
21. 21.True or false: a ramp is a wheel and axle. (a) True (b) False
22. 22.⚖️ 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
23. 23.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
24. 24.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
25. 25.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) changes pull direction (d) makes it magnetic
26. 26.⚖️ 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
27. 27.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
28. 28.True or false: a well pulley is a lever. (a) False (b) True
29. 29.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) turmeric powder (d) yeast
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) string (c) a pencil (d) an empty thread reel
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) an empty thread reel (d) string
33. 33.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
34. 34.True or false: string is needed for the thread-reel pulley. (a) True (b) False
35. 35.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys
37. 37.True or false: a ramp uses a pulley. (a) False (b) True
38. 38.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it gets hot (d) it is magnetic
39. 39.True or false: a crane is a wheel and axle. (a) True (b) False
40. 40.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a ramp (c) a steering wheel (d) a see-saw

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