Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 68 · 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? Which of these is the one thing we change? (a) how hard we must pull (b) the same string (c) number of pulleys (d) the same cup of coins
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) True (b) False
3. 3.⚖️ 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
4. 4.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
5. 5.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
6. 6.⚖️ 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) the lifting height (c) how hard we must pull
7. 7.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet
8. 8.⚖️ 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
9. 9.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
10. 10.⚖️ 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 measure it (c) we change it
11. 11.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
12. 12.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
13. 13.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
14. 14.⚖️ 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
15. 15.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
17. 17.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the rope gets shorter (c) the bucket floats (d) water gets lighter
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) turmeric powder (c) a magnet (d) yeast
19. 19.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
20. 20.🛟 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
21. 21.⚖️ 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 measure it (b) we keep it the same (c) we change it
22. 22.True or false: a doorknob uses a pulley. (a) False (b) True
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.⚖️ 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) the lifting height (c) number of pulleys (d) the same cup of coins
25. 25.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
26. 26.⚙️ Which of these uses a pulley? (a) a sloping road (b) a doorknob (c) a flagpole (d) a bottle opener
27. 27.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
28. 28.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a tap handle (c) a doorknob (d) a sloping road
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) yeast (d) a small paper cup
30. 30.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) adds weight (d) changes pull direction
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) a small paper cup (d) turmeric powder
32. 32.🧺 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
33. 33.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a see-saw (c) a crowbar (d) a slide
34. 34.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
35. 35.⚖️ 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
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a pencil (d) a magnet
37. 37.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) a battery cell (d) a pencil
39. 39.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) a pencil (d) coins as the load

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