Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 908 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a battery cell (c) coins as the load (d) a pencil
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
3. 3.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets wet (d) it gets longer
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) coins as the load (c) a small paper cup (d) string
5. 5.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
6. 6.⚖️ 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) True (b) False
7. 7.⚖️ 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) how hard we must pull (c) the same cup of coins (d) number of pulleys
8. 8.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a spoon lifting a lid (c) a sloping road (d) a well pulley
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a balloon (c) coins as the load (d) an empty thread reel
10. 10.🇮🇳 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
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) a balloon (d) a small paper cup
12. 12.⚖️ 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 same cup of coins
13. 13.⚙️ Which of these uses a pulley? (a) a ramp (b) a flagpole (c) a see-saw (d) a slide
14. 14.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) the same (d) about half
15. 15.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
16. 16.True or false: a crane is a wheel and axle. (a) False (b) True
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the lifting height (c) the same string (d) how hard we must pull
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a pencil (c) turmeric powder (d) a balloon
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) coins as the load (d) a mirror
20. 20.True or false: a crane is a lever. (a) True (b) False
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) string (d) a mirror
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a balloon (c) a magnet (d) coins as the load
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we change it (c) we measure it
24. 24.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) up (d) in a circle
25. 25.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
26. 26.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
27. 27.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
28. 28.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 40 cm (d) 20 cm
29. 29.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
30. 30.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) an empty thread reel (d) yeast
32. 32.⚙️ Which simple machine is a flagpole? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
33. 33.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
34. 34.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
35. 35.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a crane (c) a see-saw (d) a slide
36. 36.⚖️ 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 measure it (b) we keep it the same (c) we change it
37. 37.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
38. 38.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) water gets lighter (c) the rope gets shorter (d) the bucket floats
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) turmeric powder (c) string (d) a small paper cup
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a small paper cup (c) a pencil (d) string

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