Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 223 · 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.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the rope gets shorter (c) the bucket floats (d) pulling down is easier
2. 2.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) coins as the load (c) turmeric powder (d) a battery cell
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 measure it (b) we change it (c) we keep it the same
5. 5.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) in a circle (d) up
6. 6.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
7. 7.⚖️ 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) number of pulleys (c) the lifting height (d) the same string
8. 8.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
9. 9.⚖️ 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
10. 10.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
11. 11.⚖️ 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) the same cup of coins (c) how hard we must pull
12. 12.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) harder (d) easier
13. 13.True or false: a steering wheel is an inclined plane. (a) True (b) False
14. 14.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
15. 15.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it can hurt your finger (d) it turns blue
16. 16.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a ramp (c) a sloping road (d) a well pulley
17. 17.True or false: a slide uses a pulley. (a) False (b) True
18. 18.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) in the tap (d) on the bench
19. 19.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a see-saw (c) a crowbar (d) a bottle opener
20. 20.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it gets hot (d) it could fall on you
21. 21.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) a pencil (d) a mirror
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) yeast (d) a magnet
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we keep it the same (b) we change it (c) we measure it
25. 25.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) string (c) a balloon (d) a magnet
27. 27.⚖️ 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
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a small paper cup (d) yeast
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) False (b) True
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) turmeric powder (d) coins as the load
31. 31.⚖️ 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
32. 32.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
33. 33.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
34. 34.True or false: a bottle opener uses a pulley. (a) False (b) True
35. 35.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
36. 36.True or false: a sloping road is a lever. (a) False (b) True
37. 37.⚖️ 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 cup of coins (d) the lifting height
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) a magnet (d) a pencil
39. 39.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
40. 40.⚖️ 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

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