Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 748 · 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.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
2. 2.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys 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? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the same cup of coins
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) turmeric powder (c) a magnet (d) a mirror
6. 6.⚙️ Which simple machine is a crane? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
7. 7.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
8. 8.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
9. 9.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a slide (c) a bottle opener (d) a crane
10. 10.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
11. 11.⚙️ Which of these is a lever? (a) a crane (b) a steering wheel (c) a crowbar (d) a well pulley
12. 12.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
13. 13.⚖️ 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) False (b) True
14. 14.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) battery (d) magnet
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) a mirror (d) turmeric powder
16. 16.🧺 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) yeast
17. 17.True or false: a crowbar is an inclined plane. (a) True (b) False
18. 18.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a sloping road (c) a flagpole (d) a doorknob
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) the same cup of coins (c) the same string (d) how hard we must pull
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) yeast (c) a mirror (d) a magnet
21. 21.⚖️ 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
22. 22.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 20 cm (d) 5 cm
23. 23.⚙️ Which of these is a lever? (a) a crane (b) a well pulley (c) a see-saw (d) a tap handle
24. 24.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the lifting height
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a mirror (c) string (d) a pencil
27. 27.True or false: a tap handle is a wheel and axle. (a) False (b) True
28. 28.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
29. 29.True or false: string is needed for the thread-reel pulley. (a) True (b) False
30. 30.True or false: a crowbar is a lever. (a) False (b) True
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) number of pulleys (b) the same cup of coins (c) the lifting height (d) the same string
32. 32.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) easier (d) the same
33. 33.🛟 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
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a balloon (d) a small paper cup
35. 35.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) makes it magnetic (d) halves the weight
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a magnet (d) an empty thread reel
37. 37.⚖️ 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
38. 38.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
39. 39.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) an empty thread reel (d) turmeric powder

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