Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 87 · 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.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the bench (c) on the blackboard (d) in the tap
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
3. 3.⚖️ 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
4. 4.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it is magnetic (d) it could fall on you
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) True (b) False
6. 6.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
7. 7.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it can hurt your finger (d) it turns blue
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a magnet (d) a small paper cup
9. 9.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
10. 10.⚖️ 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
11. 11.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) string (d) coins as the load
13. 13.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
14. 14.⚖️ 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
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a balloon (c) an empty thread reel (d) a battery cell
16. 16.⚖️ 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 lifting height (d) the same string
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the same cup of coins (c) the same string (d) the lifting height
18. 18.True or false: a crane is a lever. (a) True (b) False
19. 19.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a crane (c) a sloping road (d) a doorknob
20. 20.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
21. 21.True or false: a flagpole uses a pulley. (a) False (b) True
22. 22.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
23. 23.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) nail (d) battery
24. 24.True or false: a doorknob is a wheel and axle. (a) False (b) True
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) turmeric powder (c) coins as the load (d) a small paper cup
26. 26.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
27. 27.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
28. 28.⚙️ Which of these is a lever? (a) a well pulley (b) a flagpole (c) a spoon lifting a lid (d) a ramp
29. 29.⚖️ 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
30. 30.True or false: a doorknob is an inclined plane. (a) False (b) True
31. 31.True or false: a ramp is a lever. (a) True (b) False
32. 32.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a crowbar (c) a ramp (d) a bottle opener
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) yeast (d) string
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) string (d) a pencil
35. 35.⚙️ Which simple machine is a crowbar? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
36. 36.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
37. 37.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
38. 38.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) makes it magnetic (d) adds weight
39. 39.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
40. 40.⚙️ Which of these is a lever? (a) a well pulley (b) a crane (c) a flagpole (d) a bottle opener

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