Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 193 · 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 of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) a mirror (d) a small paper cup
2. 2.True or false: a slide is an inclined plane. (a) False (b) True
3. 3.⚖️ 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 measure it (c) we keep it the same
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) a balloon (d) a pencil
5. 5.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) a balloon (d) an empty thread reel
7. 7.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) impossible (d) the same
8. 8.🧺 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) a magnet
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) the same string (b) the same cup of coins (c) the lifting height (d) number of pulleys
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a balloon (d) an empty thread reel
11. 11.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a pencil (d) a magnet
13. 13.True or false: a bottle opener is a lever. (a) True (b) False
14. 14.True or false: a crane uses a pulley. (a) True (b) False
15. 15.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
16. 16.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
18. 18.True or false: a steering wheel is a lever. (a) True (b) False
19. 19.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) double (d) zero
20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a battery cell (c) an empty thread reel (d) coins as the load
21. 21.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
22. 22.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
23. 23.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) down (d) up
24. 24.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
25. 25.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) on the bench (d) in the tap
26. 26.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) halves the weight (c) adds weight (d) changes pull direction
27. 27.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
28. 28.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
29. 29.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
30. 30.⚖️ 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 keep it the same (b) we change it (c) we measure it
31. 31.⚖️ 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
32. 32.⚙️ Which simple machine is a see-saw? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
33. 33.⚖️ 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) how hard we must pull (d) the same string
34. 34.⚖️ 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
35. 35.True or false: a well pulley is a lever. (a) True (b) False
36. 36.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
37. 37.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
38. 38.True or false: a ramp uses a pulley. (a) False (b) True
39. 39.True or false: a crane is a wheel and axle. (a) False (b) True
40. 40.⚙️ Which of these is an inclined plane? (a) a ramp (b) a crane (c) a steering wheel (d) a bottle opener

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