Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 231 · 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.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) a small paper cup (d) a balloon
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) an empty thread reel (c) coins as the load (d) a small paper cup
4. 4.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
5. 5.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a slide (c) a crane (d) a flagpole
6. 6.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
7. 7.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
8. 8.⚙️ Which of these is a wheel and axle? (a) a crane (b) a flagpole (c) a steering wheel (d) a see-saw
9. 9.⚖️ 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
10. 10.⚙️ Which of these is a lever? (a) a bottle opener (b) a tap handle (c) a steering wheel (d) a flagpole
11. 11.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
12. 12.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) makes it magnetic (d) changes pull direction
13. 13.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
14. 14.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the blackboard (c) on the flagpole (d) on the bench
15. 15.⚖️ 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
16. 16.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
17. 17.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
18. 18.⚙️ Which of these is a lever? (a) a ramp (b) a spoon lifting a lid (c) a sloping road (d) a well pulley
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a battery cell (c) turmeric powder (d) a magnet
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) yeast (d) a magnet
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) the same cup of coins (c) how hard we must pull (d) the lifting height
22. 22.⚖️ 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
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) string (c) a battery cell (d) turmeric powder
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a battery cell (d) a pencil
25. 25.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
27. 27.True or false: a spoon lifting a lid is a lever. (a) True (b) False
28. 28.True or false: string is needed for the thread-reel pulley. (a) False (b) True
29. 29.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) nail (c) battery (d) magnet
30. 30.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a battery cell (c) an empty thread reel (d) coins as the load
32. 32.⚖️ 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) True (b) False
33. 33.⚙️ Which simple machine is a well pulley? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
34. 34.⚖️ 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 lifting height (c) number of pulleys (d) the same cup of coins
35. 35.True or false: a crowbar uses a pulley. (a) False (b) True
36. 36.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) an empty thread reel (c) a small paper cup (d) string
38. 38.⚖️ 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
39. 39.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) coins as the load (d) a small paper cup

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