Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 603 · 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 simple machine is a slide? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
2. 2.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
3. 3.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it could fall on you (d) it is magnetic
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) string (d) yeast
5. 5.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a well pulley (c) a see-saw (d) a ramp
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) turmeric powder (d) coins as the load
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a mirror (c) coins as the load (d) a pencil
8. 8.⚖️ 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) number of pulleys (c) the same cup of coins (d) the same string
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a battery cell (c) coins as the load (d) string
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) number of pulleys (c) the same cup of coins
11. 11.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) in the tap (d) on the flagpole
12. 12.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
13. 13.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
14. 14.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
15. 15.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) sideways (d) down
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a balloon (d) a small paper cup
18. 18.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
19. 19.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
20. 20.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) an empty thread reel (d) a mirror
22. 22.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) yeast (c) a magnet (d) a balloon
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a battery cell (c) a balloon (d) yeast
25. 25.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a pencil (c) an empty thread reel (d) string
27. 27.⚙️ Which of these is a lever? (a) a steering wheel (b) a well pulley (c) a crowbar (d) a ramp
28. 28.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) string (d) yeast
30. 30.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
31. 31.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
32. 32.True or false: a crane uses a pulley. (a) True (b) False
33. 33.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) string (c) a small paper cup (d) a pencil
35. 35.True or false: a crowbar is a lever. (a) False (b) True
36. 36.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
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) the same cup of coins (b) number of pulleys (c) the lifting height (d) the same string
38. 38.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) yeast (c) a battery cell (d) a mirror
40. 40.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True

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