Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 927 · 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? What do we do with “the lifting height”? (a) we measure it (b) we keep it the same (c) we change it
2. 2.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) nail (d) battery
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys
4. 4.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) in a circle (c) up (d) sideways
5. 5.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
6. 6.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
7. 7.⚙️ Which of these uses a pulley? (a) a well pulley (b) a tap handle (c) a spoon lifting a lid (d) a ramp
8. 8.⚖️ 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 measure it (c) we keep it the same
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) an empty thread reel (d) string
10. 10.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
11. 11.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
12. 12.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a battery cell (c) a pencil (d) an empty thread reel
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) string (d) yeast
15. 15.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
16. 16.🧺 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 magnet (d) a pencil
17. 17.⚙️ Which of these is a lever? (a) a crane (b) a see-saw (c) a well pulley (d) a slide
18. 18.True or false: a sloping road is an inclined plane. (a) True (b) False
19. 19.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
20. 20.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
21. 21.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a well pulley (c) a ramp (d) a sloping road
22. 22.⚙️ Which of these uses a pulley? (a) a tap handle (b) a crane (c) a ramp (d) a bottle opener
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a small paper cup (c) a magnet (d) a balloon
24. 24.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
25. 25.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the blackboard (c) on the flagpole (d) on the bench
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) an empty thread reel (c) a pencil (d) string
27. 27.⚖️ 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
28. 28.True or false: a well pulley uses a pulley. (a) False (b) True
29. 29.True or false: a steering wheel is a wheel and axle. (a) True (b) False
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a mirror (c) an empty thread reel (d) a pencil
31. 31.⚖️ 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
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) an empty thread reel (d) turmeric powder
33. 33.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it gets hot (d) it could fall on you
34. 34.True or false: a spoon lifting a lid is a lever. (a) False (b) True
35. 35.⚖️ 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
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) a magnet (d) coins as the load
37. 37.⚖️ 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
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) an empty thread reel (c) yeast (d) a battery cell
39. 39.⚖️ 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) the same cup of coins (d) how hard we must pull
40. 40.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) easier (d) impossible

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