Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 728 · 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.True or false: a crowbar uses a pulley. (a) True (b) False
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) an empty thread reel (d) turmeric powder
3. 3.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) turmeric powder (c) yeast (d) a mirror
6. 6.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) harder (d) easier
7. 7.True or false: a crowbar 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 lifting height is the one thing we change. (a) True (b) False
9. 9.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
10. 10.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a well pulley (c) a ramp (d) a see-saw
11. 11.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) nail (c) battery (d) magnet
12. 12.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
13. 13.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
14. 14.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a battery cell (c) a pencil (d) a small paper cup
16. 16.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
17. 17.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 20 cm (d) 10 cm
18. 18.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
19. 19.⚖️ 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
20. 20.⚖️ 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
21. 21.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
22. 22.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
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 measure it (b) we change it (c) we keep it the same
24. 24.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
25. 25.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a ramp (c) a flagpole (d) a crowbar
26. 26.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a ramp (c) a crane (d) a well pulley
27. 27.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
28. 28.⚖️ 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) how hard we must pull (c) the lifting height (d) the same cup of coins
29. 29.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
30. 30.⚖️ 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
31. 31.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
32. 32.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) pulling down is easier (d) water gets lighter
33. 33.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
34. 34.True or false: a well pulley uses a pulley. (a) False (b) True
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) coins as the load (d) a balloon
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a small paper cup (d) yeast
37. 37.⚖️ 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) the same cup of coins (c) how hard we must pull
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a balloon (d) a small paper cup
39. 39.⚙️ Which of these uses a pulley? (a) a see-saw (b) a sloping road (c) a flagpole (d) a doorknob
40. 40.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing

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