Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 761 · 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) a mirror (b) a small paper cup (c) coins as the load (d) a pencil
2. 2.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 5 cm (d) 40 cm
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True
4. 4.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
5. 5.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) double (d) zero
6. 6.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) impossible (d) easier
7. 7.True or false: a flagpole is a lever. (a) False (b) True
8. 8.⚙️ Which of these is a lever? (a) a flagpole (b) a slide (c) a bottle opener (d) a steering wheel
9. 9.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
10. 10.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a mirror (d) coins as the load
12. 12.⚖️ 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
13. 13.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
14. 14.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
15. 15.⚖️ 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
16. 16.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
17. 17.⚖️ 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 change it (c) we keep it the same
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a pencil (d) yeast
19. 19.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) yeast (d) coins as the load
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) yeast (d) a battery cell
22. 22.⚙️ Which of these uses a pulley? (a) a slide (b) a steering wheel (c) a ramp (d) a well pulley
23. 23.🇮🇳 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
24. 24.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
26. 26.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
27. 27.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) coins as the load (c) an empty thread reel (d) string
29. 29.True or false: a crowbar is a lever. (a) False (b) True
30. 30.True or false: a tap handle is a lever. (a) False (b) True
31. 31.⚖️ 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 string (d) the same cup of coins
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) the lifting height (c) number of pulleys
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a pencil (d) a battery cell
34. 34.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a battery cell (c) a pencil (d) an empty thread reel
36. 36.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a well pulley (c) a bottle opener (d) a doorknob
37. 37.True or false: a spoon lifting a lid is a lever. (a) False (b) True
38. 38.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) adds weight (d) changes pull direction
39. 39.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the rope gets shorter (d) the bucket floats
40. 40.True or false: a see-saw is a lever. (a) False (b) True

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