Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 668 · 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 a magnet for the thread-reel pulley? (a) needed (b) not needed
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) an empty thread reel (c) a pencil (d) string
3. 3.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) a pencil (d) a magnet
5. 5.True or false: a mirror is 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? What do we do with “how hard we must pull”? (a) we keep it the same (b) we change it (c) we measure it
7. 7.⚙️ Which of these uses a pulley? (a) a crane (b) a slide (c) a crowbar (d) a steering wheel
8. 8.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same
10. 10.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a small paper cup (c) a magnet (d) a mirror
11. 11.⚖️ 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 measure it (c) we change it
12. 12.⚖️ 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 same cup of coins (c) number of pulleys
13. 13.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the rope gets shorter (c) pulling down is easier (d) the bucket floats
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
15. 15.⚖️ 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) number of pulleys (c) the lifting height
16. 16.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
17. 17.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
18. 18.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets longer (d) it gets wet
19. 19.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) makes it magnetic (c) halves the weight (d) adds weight
20. 20.True or false: a steering wheel uses a pulley. (a) True (b) False
21. 21.⚖️ 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) how hard we must pull (c) the same cup of coins (d) the lifting height
22. 22.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) the same (d) impossible
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 change it (b) we measure it (c) we keep it the same
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) a mirror (d) a battery cell
25. 25.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it might sing (d) it is magnetic
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) how hard we must pull (c) number of pulleys
27. 27.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
28. 28.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a slide (c) a spoon lifting a lid (d) a steering wheel
29. 29.True or false: a doorknob is a wheel and axle. (a) True (b) False
30. 30.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) battery (d) magnet
31. 31.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
32. 32.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a flagpole (c) a ramp (d) a doorknob
33. 33.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
34. 34.⚖️ 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) False (b) True
35. 35.True or false: a tap handle uses a pulley. (a) False (b) True
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a balloon (c) an empty thread reel (d) a pencil
37. 37.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a ramp (c) a bottle opener (d) a steering wheel
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a battery cell (c) a magnet (d) coins as the load
39. 39.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the flagpole (c) in the tap (d) on the blackboard
40. 40.True or false: a tap handle is an inclined plane. (a) False (b) True

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