Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 577 · 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.🧺 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) turmeric powder (d) coins as the load
2. 2.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) pulling down is easier (c) water gets lighter (d) the rope gets shorter
3. 3.⚖️ 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 cup of coins (b) how hard we must pull (c) number of pulleys (d) the lifting height
4. 4.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
5. 5.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
6. 6.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
7. 7.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
8. 8.⚖️ 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
9. 9.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a ramp (c) a spoon lifting a lid (d) a bottle opener
10. 10.⚖️ 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
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) string (d) yeast
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) yeast (c) turmeric powder (d) a pencil
13. 13.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
14. 14.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) coins as the load (d) string
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) how hard we must pull (c) the same string (d) number of pulleys
17. 17.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it is magnetic (d) it could fall on you
18. 18.⚖️ 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
19. 19.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) in a circle (d) sideways
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
21. 21.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
22. 22.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a flagpole (c) a slide (d) a crane
23. 23.⚖️ 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 change it (b) we keep it the same (c) we measure it
24. 24.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it gets longer (d) it turns blue
25. 25.True or false: a crane uses a pulley. (a) False (b) True
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a mirror (c) a pencil (d) coins as the load
27. 27.⚖️ 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 lifting height
28. 28.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
29. 29.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) turmeric powder (d) a battery cell
31. 31.🧺 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) string (d) a mirror
32. 32.⚖️ 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
33. 33.True or false: a bottle opener is a lever. (a) True (b) False
34. 34.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) a balloon (d) an empty thread reel
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) turmeric powder (c) a magnet (d) a balloon
37. 37.⚖️ 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
38. 38.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a bottle opener (c) a sloping road (d) a slide
39. 39.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the blackboard (d) on the flagpole
40. 40.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed

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