Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 197 · 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) a pencil (b) turmeric powder (c) coins as the load (d) an empty thread reel
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
3. 3.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
4. 4.True or false: a slide is a wheel and axle. (a) True (b) False
5. 5.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
6. 6.⚖️ 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
7. 7.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
8. 8.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
9. 9.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a balloon (c) a small paper cup (d) an empty thread reel
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
12. 12.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
13. 13.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
14. 14.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) up (d) in a circle
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) a mirror (d) coins as the load
16. 16.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
17. 17.⚖️ 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 measure it (c) we change it
18. 18.True or false: a flagpole is a wheel and axle. (a) False (b) True
19. 19.⚖️ 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) the same string (c) the lifting height (d) number of pulleys
20. 20.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
21. 21.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
22. 22.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
24. 24.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) turmeric powder (c) a battery cell (d) yeast
26. 26.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
27. 27.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
28. 28.True or false: string is needed for the thread-reel pulley. (a) True (b) False
29. 29.True or false: a tap handle is a wheel and axle. (a) False (b) True
30. 30.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
31. 31.⚖️ 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
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) an empty thread reel (d) a battery cell
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a battery cell (c) string (d) coins as the load
34. 34.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
35. 35.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) coins as the load (d) a pencil
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) yeast (c) a pencil (d) coins as the load
38. 38.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a tap handle (c) a flagpole (d) a slide
39. 39.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it could fall on you (d) it is magnetic
40. 40.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True

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