Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 392 · 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 what we measure? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull (d) the lifting height
2. 2.⚙️ Which of these uses a pulley? (a) a tap handle (b) a spoon lifting a lid (c) a sloping road (d) a crane
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we keep it the same (c) we measure it
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) a pencil (d) yeast
5. 5.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it is magnetic (d) it gets hot
6. 6.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
7. 7.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) zero (d) double
8. 8.🧺 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 small paper cup (d) a mirror
9. 9.⚖️ 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
10. 10.⚖️ 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 string (b) the lifting height (c) number of pulleys (d) how hard we must pull
11. 11.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
12. 12.⚖️ 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
13. 13.⚖️ 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) how hard we must pull (c) the lifting height
14. 14.⚖️ 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) False (b) True
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
16. 16.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
17. 17.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) coins as the load (c) a pencil (d) a battery cell
19. 19.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
20. 20.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) easier (d) harder
21. 21.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
22. 22.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
23. 23.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
24. 24.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the flagpole (c) on the bench (d) on the blackboard
25. 25.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) string (d) coins as the load
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
28. 28.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
29. 29.⚖️ 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
30. 30.⚖️ 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 change it (b) we measure it (c) we keep it the same
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) yeast (d) an empty thread reel
32. 32.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) turmeric powder (d) a battery cell
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) a pencil (c) coins as the load (d) a small paper cup
35. 35.True or false: a spoon lifting a lid is a lever. (a) False (b) True
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) a small paper cup (d) a mirror
37. 37.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
38. 38.True or false: a slide is an inclined plane. (a) True (b) False
39. 39.🧺 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 battery cell (d) a pencil
40. 40.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False

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