Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 900 · 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 a lever? (a) a sloping road (b) a well pulley (c) a crowbar (d) a slide
2. 2.⚖️ 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 change it (c) we measure it
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same cup of coins (b) how hard we must pull (c) the lifting height (d) number of pulleys
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) a battery cell (d) yeast
6. 6.True or false: string is needed for the thread-reel pulley. (a) False (b) True
7. 7.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) easier (d) the same
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) an empty thread reel (c) string (d) coins as the load
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
10. 10.⚖️ 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
11. 11.⚖️ 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
12. 12.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) nail (d) magnet
13. 13.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
14. 14.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
15. 15.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
16. 16.⚖️ 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 lifting height (c) how hard we must pull
17. 17.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) changes pull direction (d) adds weight
18. 18.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
19. 19.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it gets hot (d) it could fall on you
20. 20.⚖️ 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
21. 21.⚙️ Which of these uses a pulley? (a) a crowbar (b) a steering wheel (c) a well pulley (d) a spoon lifting a lid
22. 22.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
23. 23.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a crowbar (c) a tap handle (d) a flagpole
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) turmeric powder (c) an empty thread reel (d) a pencil
25. 25.⚙️ Which of these uses a pulley? (a) a sloping road (b) a steering wheel (c) a doorknob (d) a crane
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) yeast (c) coins as the load (d) an empty thread reel
27. 27.True or false: a crowbar is a wheel and axle. (a) False (b) True
28. 28.True or false: a doorknob is a wheel and axle. (a) False (b) True
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) turmeric powder (d) coins as the load
30. 30.🇮🇳 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
31. 31.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
32. 32.True or false: a crowbar is a lever. (a) True (b) False
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) a pencil (d) a small paper cup
34. 34.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
35. 35.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
36. 36.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the rope gets shorter (d) the bucket floats
37. 37.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a balloon (c) a small paper cup (d) an empty thread reel
39. 39.True or false: a well pulley uses a pulley. (a) True (b) False
40. 40.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed

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