Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 368 · 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 of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) a mirror (d) a pencil
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) coins as the load (d) a magnet
3. 3.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
4. 4.🛟 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
5. 5.🔮 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
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) string (c) a small paper cup (d) coins as the load
7. 7.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
8. 8.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same cup of coins (c) number of pulleys (d) how hard we must pull
10. 10.True or false: a see-saw is a lever. (a) False (b) True
11. 11.⚖️ 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 string
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a mirror (d) a small paper cup
13. 13.🇮🇳 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
14. 14.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
15. 15.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
16. 16.⚖️ 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 change it (c) we keep it the same
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) a mirror (d) a pencil
18. 18.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) nail (d) battery
19. 19.⚖️ 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 keep it the same (c) we change it
20. 20.⚙️ Which of these is a lever? (a) a tap handle (b) a see-saw (c) a sloping road (d) a crane
21. 21.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it gets hot (d) it could fall on you
22. 22.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
23. 23.⚖️ 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) False (b) True
24. 24.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) a small paper cup (d) yeast
26. 26.True or false: a slide is a wheel and axle. (a) False (b) True
27. 27.⚙️ Which simple machine is a see-saw? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
28. 28.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we keep it the same (c) we measure it
30. 30.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
31. 31.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) coins as the load (c) turmeric powder (d) an empty thread reel
33. 33.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
34. 34.True or false: a ramp is an inclined plane. (a) False (b) True
35. 35.⚙️ Which of these is an inclined plane? (a) a slide (b) a spoon lifting a lid (c) a bottle opener (d) a tap handle
36. 36.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a sloping road (c) a crowbar (d) a flagpole
37. 37.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
38. 38.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a tap handle (c) a flagpole (d) a well pulley
39. 39.⚙️ Which of these is a lever? (a) a tap handle (b) a well pulley (c) a ramp (d) a spoon lifting a lid
40. 40.⚖️ 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) the same cup of coins (c) the lifting height (d) how hard we must pull

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