Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 594 · 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.⚖️ 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
2. 2.⚖️ 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
3. 3.⚖️ 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) how hard we must pull (c) the same cup of coins (d) number of pulleys
4. 4.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
5. 5.True or false: string is needed for the thread-reel pulley. (a) False (b) True
6. 6.🇮🇳 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
7. 7.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
8. 8.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
9. 9.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it is magnetic (d) it gets hot
10. 10.🏗️ 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
11. 11.⚖️ 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
12. 12.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) pulling down is easier (c) water gets lighter (d) the bucket floats
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a battery cell (c) yeast (d) string
14. 14.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
15. 15.⚙️ Which of these is a lever? (a) a flagpole (b) a spoon lifting a lid (c) a sloping road (d) a steering wheel
16. 16.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
17. 17.⚖️ 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
18. 18.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
19. 19.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we change it (c) we measure it
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) an empty thread reel (c) string (d) coins as the load
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the same cup of coins (c) the lifting height (d) the same string
23. 23.⚖️ 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) True (b) False
24. 24.⚖️ 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
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) coins as the load (d) a balloon
26. 26.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a bottle opener (c) a spoon lifting a lid (d) a slide
27. 27.⚖️ 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) the lifting height (c) number of pulleys
28. 28.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
30. 30.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) the same (d) zero
31. 31.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
32. 32.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
33. 33.⚙️ Which of these is a lever? (a) a ramp (b) a steering wheel (c) a crane (d) a crowbar
34. 34.🧺 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 pencil (d) a battery cell
35. 35.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
36. 36.True or false: a spoon lifting a lid is a lever. (a) False (b) True
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) turmeric powder (c) yeast (d) an empty thread reel
38. 38.⚖️ 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
39. 39.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
40. 40.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle

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