Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 547 · 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) turmeric powder (b) a small paper cup (c) yeast (d) a balloon
2. 2.⚖️ 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 measure it (c) we change it
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) turmeric powder (d) coins as the load
4. 4.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) harder (d) impossible
5. 5.🧺 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) turmeric powder (d) a pencil
6. 6.⚙️ Which simple machine is a see-saw? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
7. 7.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
8. 8.🛟 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
9. 9.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a ramp (c) a crane (d) a steering wheel
10. 10.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) a battery cell (d) a mirror
11. 11.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
13. 13.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) halves the weight (d) changes pull direction
14. 14.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
15. 15.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
17. 17.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
18. 18.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 5 cm (d) 40 cm
19. 19.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the flagpole (d) on the bench
20. 20.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
21. 21.⚙️ Which of these is a lever? (a) a slide (b) a see-saw (c) a flagpole (d) a crane
22. 22.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) yeast (c) turmeric powder (d) coins as the load
24. 24.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
25. 25.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) number of pulleys (c) the same string (d) the same cup of coins
27. 27.⚖️ 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) how hard we must pull (c) the lifting height
28. 28.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
29. 29.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) string (d) a pencil
30. 30.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
31. 31.⚖️ 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
32. 32.⚖️ 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
33. 33.⚖️ 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
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) a balloon (d) a small paper cup
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) True (b) False
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
37. 37.True or false: a sloping road is a wheel and axle. (a) False (b) True
38. 38.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) nail (d) magnet
39. 39.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
40. 40.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever

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