Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 349 · 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) an empty thread reel (b) a balloon (c) a magnet (d) turmeric powder
2. 2.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the flagpole (d) on the blackboard
3. 3.⚖️ 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) False (b) True
4. 4.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
5. 5.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) battery (d) nail
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) a pencil (d) an empty thread reel
7. 7.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a sloping road (c) a doorknob (d) a see-saw
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) turmeric powder (c) a pencil (d) coins as the load
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a small paper cup (d) a battery cell
10. 10.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
11. 11.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
12. 12.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a crowbar (c) a steering wheel (d) a sloping road
13. 13.True or false: a crowbar is a wheel and axle. (a) False (b) True
14. 14.⚙️ Which simple machine is a crane? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
15. 15.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) changes pull direction (d) adds weight
16. 16.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
17. 17.True or false: a doorknob uses a pulley. (a) False (b) True
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) coins as the load (d) a pencil
19. 19.⚖️ 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
20. 20.⚙️ Which simple machine is a slide? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
21. 21.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
22. 22.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
23. 23.⚖️ 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
24. 24.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
25. 25.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
26. 26.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) water gets lighter (d) pulling down is easier
27. 27.⚖️ 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) the lifting height (d) number of pulleys
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a pencil (c) coins as the load (d) string
29. 29.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
30. 30.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it turns blue (d) it can hurt your finger
31. 31.⚙️ Which of these is a lever? (a) a ramp (b) a doorknob (c) a bottle opener (d) a flagpole
32. 32.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it is magnetic (d) it gets hot
33. 33.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 5 cm (d) 20 cm
34. 34.⚖️ 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
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) the same string (c) number of pulleys (d) how hard we must pull
36. 36.⚖️ 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
37. 37.⚙️ Which simple machine is a sloping road? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
38. 38.True or false: a crane is a wheel and axle. (a) False (b) True
39. 39.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a doorknob (c) a bottle opener (d) a well pulley
40. 40.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed

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