Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 876 · 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.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) down (d) sideways
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) the same string (c) number of pulleys (d) how hard we must pull
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a pencil (d) coins as the load
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) yeast (d) a pencil
5. 5.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
6. 6.⚖️ 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
7. 7.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
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.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
10. 10.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
11. 11.⚖️ 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
12. 12.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
13. 13.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
14. 14.⚖️ 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) False (b) True
15. 15.⚖️ 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 change it (b) we keep it the same (c) we measure it
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) an empty thread reel (d) a mirror
17. 17.True or false: a tap handle is a lever. (a) False (b) True
18. 18.⚖️ 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
19. 19.⚖️ 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) True (b) False
20. 20.⚖️ 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
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a battery cell (c) coins as the load (d) a pencil
22. 22.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
23. 23.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
24. 24.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the flagpole (d) on the blackboard
25. 25.True or false: string is needed for the thread-reel pulley. (a) True (b) False
26. 26.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
27. 27.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
28. 28.⚖️ 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
29. 29.🧺 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 balloon (d) a small paper cup
30. 30.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it could fall on you (d) it gets hot
31. 31.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
32. 32.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) nail (d) rope
33. 33.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
34. 34.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 40 cm (d) 10 cm
35. 35.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
36. 36.True or false: a sloping road is a lever. (a) True (b) False
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a pencil (c) coins as the load (d) a small paper cup
38. 38.⚖️ 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) False (b) True
39. 39.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) a small paper cup (c) coins as the load (d) an empty thread reel

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