Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 309 · 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 blackboard (b) on the bench (c) in the tap (d) on the flagpole
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) number of pulleys (c) how hard we must pull (d) the lifting height
4. 4.⚖️ 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 change it (c) we measure it
5. 5.⚖️ 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 keep it the same (c) we measure it
6. 6.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
7. 7.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
8. 8.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
9. 9.⚖️ 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
10. 10.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) pulling down is easier (c) the rope gets shorter (d) water gets lighter
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) an empty thread reel (c) a pencil (d) a small paper cup
12. 12.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) an empty thread reel (d) a magnet
14. 14.⚙️ Which simple machine is a see-saw? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
15. 15.⚖️ 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 string (b) how hard we must pull (c) number of pulleys (d) the lifting height
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) turmeric powder (c) a pencil (d) an empty thread reel
17. 17.True or false: a crane is a lever. (a) True (b) False
18. 18.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
19. 19.⚙️ Which of these is an inclined plane? (a) a slide (b) a steering wheel (c) a bottle opener (d) a well pulley
20. 20.🛟 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
21. 21.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins
23. 23.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
24. 24.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a battery cell (c) an empty thread reel (d) a small paper cup
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) a pencil (d) a balloon
27. 27.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
28. 28.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
30. 30.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) a pencil (c) coins as the load (d) a small paper cup
32. 32.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) adds weight (c) halves the weight (d) makes it magnetic
33. 33.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) in a circle (c) sideways (d) up
34. 34.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it might sing (d) it is magnetic
35. 35.⚖️ 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
36. 36.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) coins as the load (d) a magnet
38. 38.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
39. 39.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True

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