Pulley STEM Project Worksheet

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

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