Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 181 · 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.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it turns blue (d) it can hurt your finger
2. 2.⚖️ 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 keep it the same (b) we change it (c) we measure it
3. 3.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
4. 4.⚙️ Which simple machine is a flagpole? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
5. 5.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 5 cm (d) 20 cm
6. 6.⚖️ 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 measure it (c) we keep it the same
7. 7.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
8. 8.True or false: a crowbar is a lever. (a) True (b) False
9. 9.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
10. 10.⚙️ Which simple machine is a tap handle? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
11. 11.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
12. 12.⚙️ Which of these is a lever? (a) a doorknob (b) a see-saw (c) a flagpole (d) a well pulley
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a mirror (c) a pencil (d) an empty thread reel
14. 14.⚙️ Which of these uses a pulley? (a) a slide (b) a ramp (c) a crane (d) a bottle opener
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
16. 16.⚖️ 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) False (b) True
17. 17.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
18. 18.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
19. 19.⚖️ 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) how hard we must pull (d) the lifting height
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a balloon (d) a small paper cup
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) turmeric powder (c) string (d) a battery cell
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) an empty thread reel (c) coins as the load (d) a small paper cup
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.⚖️ 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
25. 25.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
26. 26.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
27. 27.True or false: string is needed for the thread-reel pulley. (a) True (b) False
28. 28.⚙️ Which of these uses a pulley? (a) a see-saw (b) a slide (c) a sloping road (d) a flagpole
29. 29.True or false: a bottle opener is a lever. (a) True (b) False
30. 30.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a well pulley (c) a sloping road (d) a tap handle
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) turmeric powder (d) a small paper cup
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) coins as the load (c) an empty thread reel (d) a small paper cup
33. 33.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a crowbar (c) a steering wheel (d) a crane
34. 34.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) a battery cell (d) turmeric powder
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) string (c) an empty thread reel (d) a pencil
37. 37.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
38. 38.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
39. 39.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) impossible (d) the same
40. 40.⚖️ 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 lifting height (c) number of pulleys

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