Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 485 · 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.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) turmeric powder (d) yeast
3. 3.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
5. 5.⚙️ Which of these is a lever? (a) a well pulley (b) a ramp (c) a slide (d) a spoon lifting a lid
6. 6.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
7. 7.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
8. 8.⚖️ 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 keep it the same (c) we change it
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
10. 10.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
11. 11.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
12. 12.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) yeast (d) coins as the load
14. 14.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
15. 15.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a see-saw (c) a ramp (d) a bottle opener
16. 16.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) in a circle (d) sideways
17. 17.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
18. 18.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
19. 19.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) changes pull direction (d) makes it magnetic
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
21. 21.True or false: a see-saw is a lever. (a) True (b) False
22. 22.⚖️ 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) False (b) True
23. 23.⚖️ 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
24. 24.⚖️ 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 change it (b) we keep it the same (c) we measure it
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) an empty thread reel (c) coins as the load (d) a small paper cup
26. 26.⚖️ 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
27. 27.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
28. 28.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
29. 29.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
30. 30.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) the bucket floats (d) pulling down is easier
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
32. 32.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the bench (c) on the flagpole (d) on the blackboard
33. 33.True or false: a flagpole uses a pulley. (a) True (b) False
34. 34.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the same string (c) number of pulleys (d) the lifting height
36. 36.⚖️ 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) the same string (c) how hard we must pull
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) turmeric powder (d) a pencil
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) string (c) a small paper cup (d) coins as the load
39. 39.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it gets hot (d) it could fall on you
40. 40.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it turns blue (d) it gets longer

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