Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 815 · 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? What do we do with “the lifting height”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
3. 3.⚙️ Which of these is a lever? (a) a sloping road (b) a ramp (c) a see-saw (d) a flagpole
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a balloon (c) an empty thread reel (d) string
5. 5.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
6. 6.⚖️ 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
7. 7.⚖️ 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 same cup of coins
8. 8.True or false: a ramp is an inclined plane. (a) False (b) True
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) coins as the load (d) a mirror
10. 10.⚖️ 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 same string (c) number of pulleys
11. 11.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
12. 12.⚖️ 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 keep it the same (c) we change it
13. 13.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) a magnet (d) an empty thread reel
15. 15.True or false: a slide is a wheel and axle. (a) True (b) False
16. 16.⚖️ 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
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) coins as the load (d) turmeric powder
18. 18.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets wet (d) it gets longer
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) yeast (c) string (d) coins as the load
20. 20.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
21. 21.⚙️ Which of these uses a pulley? (a) a slide (b) a well pulley (c) a crowbar (d) a ramp
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the same string (c) the same cup of coins (d) how hard we must pull
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a magnet (d) a pencil
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) a pencil (c) coins as the load (d) string
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) yeast (c) turmeric powder (d) a mirror
26. 26.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
27. 27.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the bench (c) on the blackboard (d) on the flagpole
28. 28.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a crowbar (c) a well pulley (d) a slide
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) False (b) True
30. 30.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 10 cm (d) 40 cm
31. 31.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a crowbar (c) a sloping road (d) a tap handle
32. 32.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
34. 34.⚖️ 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
35. 35.True or false: a sloping road uses a pulley. (a) True (b) False
36. 36.⚙️ Which of these is an inclined plane? (a) a ramp (b) a crane (c) a tap handle (d) a well pulley
37. 37.⚖️ 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) number of pulleys (c) the same cup of coins (d) the lifting height
38. 38.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
39. 39.🛟 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
40. 40.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed

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