Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 715 · 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 magnet is not needed for the thread-reel pulley. (a) True (b) False
2. 2.⚖️ 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
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a small paper cup (d) turmeric powder
4. 4.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) yeast (c) a pencil (d) an empty thread reel
6. 6.True or false: string 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) string (b) a small paper cup (c) a battery cell (d) a pencil
8. 8.True or false: a tap handle uses a pulley. (a) True (b) False
9. 9.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
10. 10.⚙️ Which of these is an inclined plane? (a) a crane (b) a ramp (c) a flagpole (d) a tap handle
11. 11.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
12. 12.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
13. 13.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a slide (c) a crowbar (d) a doorknob
14. 14.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it is magnetic (d) it gets hot
15. 15.⚖️ 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
16. 16.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a flagpole (c) a crowbar (d) a slide
17. 17.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
18. 18.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) on the flagpole (d) in the tap
19. 19.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer
20. 20.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
21. 21.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) turmeric powder (d) coins as the load
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a magnet (d) a small paper cup
24. 24.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
25. 25.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same
27. 27.True or false: a crane uses a pulley. (a) True (b) False
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) number of pulleys (d) the same cup of coins
29. 29.True or false: a doorknob is a wheel and axle. (a) False (b) True
30. 30.True or false: a bottle opener is a lever. (a) True (b) False
31. 31.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
32. 32.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
33. 33.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
34. 34.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
35. 35.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) how hard we must pull (c) number of pulleys
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) True (b) False
38. 38.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) harder (d) easier
39. 39.True or false: a crowbar is a lever. (a) False (b) True
40. 40.⚖️ 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

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