Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 248 · 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 “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
3. 3.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
4. 4.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
5. 5.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
6. 6.⚖️ 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 measure it (c) we keep it the same
7. 7.⚖️ 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
8. 8.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
9. 9.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
10. 10.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) turmeric powder (d) a pencil
11. 11.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) in the tap (d) on the flagpole
12. 12.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it might sing (d) it could fall on you
13. 13.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) the same (d) impossible
14. 14.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
15. 15.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a pencil (d) turmeric powder
17. 17.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
19. 19.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) changes pull direction (d) adds weight
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a magnet (c) a pencil (d) a small paper cup
21. 21.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a slide (c) a doorknob (d) a well pulley
22. 22.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
24. 24.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a spoon lifting a lid (c) a ramp (d) a tap handle
25. 25.True or false: a see-saw uses a pulley. (a) False (b) True
26. 26.🔮 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
27. 27.True or false: a flagpole uses a pulley. (a) True (b) False
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a mirror (c) yeast (d) a balloon
29. 29.⚖️ 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) the lifting height (c) number of pulleys (d) how hard we must pull
30. 30.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a balloon (c) a small paper cup (d) coins as the load
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) a battery cell (d) coins as the load
33. 33.True or false: a bottle opener is a wheel and axle. (a) True (b) False
34. 34.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a steering wheel (c) a crane (d) a slide
35. 35.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
36. 36.True or false: string is needed for the thread-reel pulley. (a) False (b) True
37. 37.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
38. 38.⚙️ Which of these uses a pulley? (a) a well pulley (b) a bottle opener (c) a tap handle (d) a doorknob
39. 39.🧺 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) string (d) yeast
40. 40.True or false: a ramp is a lever. (a) True (b) False

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