Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 825 · 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.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) coins as the load (c) a balloon (d) a magnet
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same cup of coins”? (a) we keep it the same (b) we change it (c) we measure it
4. 4.⚖️ 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 lifting height (c) the same cup of coins (d) number of pulleys
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a battery cell (c) turmeric powder (d) a magnet
6. 6.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it might sing (d) it could fall on you
7. 7.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) changes pull direction (d) adds weight
8. 8.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
9. 9.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
10. 10.⚖️ 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
11. 11.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
12. 12.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
13. 13.⚙️ Which of these is a lever? (a) a slide (b) a sloping road (c) a doorknob (d) a see-saw
14. 14.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) a battery cell (d) an empty thread reel
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) string (d) a battery cell
17. 17.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
18. 18.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
19. 19.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) a small paper cup (d) yeast
21. 21.⚖️ 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
22. 22.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
23. 23.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
24. 24.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) pulling down is easier (d) the rope gets shorter
25. 25.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
26. 26.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 20 cm (d) 5 cm
27. 27.True or false: a spoon lifting a lid is a lever. (a) True (b) False
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) a small paper cup (c) string (d) coins as the load
29. 29.⚙️ Which of these uses a pulley? (a) a crowbar (b) a well pulley (c) a tap handle (d) a bottle opener
30. 30.⚖️ 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 lifting height (c) number of pulleys (d) the same string
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) yeast (c) a balloon (d) a magnet
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) a mirror (d) an empty thread reel
33. 33.True or false: string is needed for the thread-reel pulley. (a) True (b) False
34. 34.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
35. 35.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) rope (d) magnet
36. 36.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
37. 37.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
38. 38.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
39. 39.⚖️ 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) the lifting height (c) number of pulleys
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we change it (c) we measure it

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