Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 536 · 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.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) about half (d) the same
2. 2.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
3. 3.🇮🇳 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
4. 4.🛟 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
5. 5.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) an empty thread reel (d) string
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) number of pulleys (b) the lifting height (c) how hard we must pull (d) the same cup of coins
8. 8.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
9. 9.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
10. 10.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
11. 11.⚙️ Which of these is a lever? (a) a ramp (b) a sloping road (c) a crowbar (d) a well pulley
12. 12.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a small paper cup (c) yeast (d) turmeric powder
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) True (b) False
15. 15.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) yeast (c) a balloon (d) a mirror
17. 17.True or false: a steering wheel is an inclined plane. (a) False (b) True
18. 18.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
19. 19.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) harder (d) the same
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a battery cell (c) coins as the load (d) an empty thread reel
21. 21.True or false: a well pulley uses a pulley. (a) False (b) True
22. 22.⚙️ Which of these uses a pulley? (a) a slide (b) a crowbar (c) a see-saw (d) a well pulley
23. 23.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) down (d) up
24. 24.⚖️ 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
25. 25.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a mirror (c) coins as the load (d) an empty thread reel
27. 27.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a slide (c) a ramp (d) a steering wheel
28. 28.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
29. 29.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) rope (d) battery
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) coins as the load (c) a small paper cup (d) a pencil
31. 31.🧺 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) a mirror
32. 32.⚖️ 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 lifting height (c) how hard we must pull
33. 33.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) pulling down is easier (c) the bucket floats (d) water gets lighter
34. 34.⚖️ 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) the lifting height (c) the same cup of coins (d) the same string
35. 35.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
36. 36.True or false: a crowbar uses a pulley. (a) True (b) False
37. 37.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
38. 38.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a magnet (c) an empty thread reel (d) string
40. 40.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False

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