Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 282 · 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? True or false: the lifting height is kept the same. (a) True (b) False
2. 2.🔮 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
3. 3.⚖️ 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) the same string (c) the same cup of coins (d) number of pulleys
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) number of pulleys (c) the same string (d) how hard we must pull
5. 5.⚖️ 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
6. 6.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
7. 7.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it gets longer (d) it turns blue
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a battery cell (d) an empty thread reel
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a pencil (c) string (d) an empty thread reel
10. 10.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it might sing (d) it is magnetic
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) string (c) coins as the load (d) a small paper cup
12. 12.⚙️ Which of these uses a pulley? (a) a doorknob (b) a see-saw (c) a well pulley (d) a tap handle
13. 13.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a crane (c) a flagpole (d) a see-saw
14. 14.⚖️ 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 change it (b) we keep it the same (c) we measure it
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) turmeric powder (d) coins as the load
16. 16.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) impossible (d) the same
17. 17.⚙️ Which of these is a lever? (a) a well pulley (b) a doorknob (c) a ramp (d) a see-saw
18. 18.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a well pulley (c) a ramp (d) a bottle opener
19. 19.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
20. 20.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) a magnet (d) coins as the load
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
23. 23.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
24. 24.⚙️ Which simple machine is a tap handle? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
25. 25.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
26. 26.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
27. 27.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
28. 28.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a sloping road (c) a tap handle (d) a ramp
29. 29.🧺 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) a pencil (d) a magnet
30. 30.⚖️ 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
31. 31.True or false: a sloping road is a lever. (a) False (b) True
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
33. 33.⚖️ 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
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) yeast (c) a small paper cup (d) coins as the load
35. 35.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
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.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
38. 38.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) a magnet (d) an empty thread reel

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