Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 222 · 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.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
2. 2.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
3. 3.🛟 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
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) turmeric powder (d) string
5. 5.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) an empty thread reel (c) coins as the load (d) a pencil
7. 7.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
8. 8.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
9. 9.⚖️ 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
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
11. 11.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
12. 12.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) sideways (d) in a circle
13. 13.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
14. 14.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a battery cell (c) an empty thread reel (d) a pencil
16. 16.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
17. 17.⚖️ 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
18. 18.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
19. 19.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) harder (d) impossible
20. 20.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) yeast (d) a pencil
22. 22.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
23. 23.True or false: a crowbar is a lever. (a) False (b) True
24. 24.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) coins as the load (d) a magnet
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a mirror (c) a balloon (d) a magnet
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) string (d) yeast
28. 28.⚖️ 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
29. 29.⚙️ Which simple machine is a see-saw? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a balloon (d) an empty thread reel
31. 31.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a ramp (c) a see-saw (d) a crowbar
32. 32.⚖️ 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) number of pulleys (c) how hard we must pull (d) the lifting height
33. 33.🇮🇳 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
34. 34.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
35. 35.True or false: a pencil 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? What do we do with “the lifting height”? (a) we measure it (b) we keep it the same (c) we change it
37. 37.True or false: a sloping road is a lever. (a) False (b) True
38. 38.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) double (d) the same
39. 39.True or false: a see-saw is a lever. (a) True (b) False
40. 40.⚖️ 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

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