Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 452 · 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.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
2. 2.⚖️ 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
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
4. 4.🧺 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 small paper cup (d) turmeric powder
5. 5.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
6. 6.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
7. 7.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
8. 8.True or false: coins as the load is 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 the one thing we change? (a) number of pulleys (b) the lifting height (c) the same cup of coins (d) how hard we must pull
10. 10.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
11. 11.True or false: a see-saw is a lever. (a) False (b) True
12. 12.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
13. 13.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it gets wet (d) it can hurt your finger
14. 14.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
15. 15.True or false: a bottle opener is an inclined plane. (a) False (b) True
16. 16.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
17. 17.🧺 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) string (d) a magnet
18. 18.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
19. 19.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) in the tap (d) on the bench
20. 20.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) nail (d) battery
21. 21.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 10 cm (d) 5 cm
22. 22.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
23. 23.True or false: a steering wheel uses a pulley. (a) True (b) False
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a balloon (c) turmeric powder (d) yeast
25. 25.⚙️ Which of these is a lever? (a) a see-saw (b) a well pulley (c) a ramp (d) a flagpole
26. 26.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) harder (d) the same
27. 27.⚖️ 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
28. 28.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
29. 29.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) pulling down is easier (c) water gets lighter (d) the rope gets shorter
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) turmeric powder (d) a mirror
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) the same cup of coins (c) number of pulleys (d) how hard we must pull
32. 32.⚖️ 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
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a balloon (d) an empty thread reel
34. 34.⚖️ 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
35. 35.⚖️ 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 keep it the same (c) we measure it
36. 36.⚖️ 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) True (b) False
37. 37.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
38. 38.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
39. 39.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
40. 40.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed

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