Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 524 · 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 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
2. 2.⚖️ 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 measure it (c) we keep it the same
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
4. 4.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a slide (c) a ramp (d) a tap handle
5. 5.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet
6. 6.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a doorknob (c) a slide (d) a see-saw
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) how hard we must pull (c) number of pulleys
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
9. 9.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
10. 10.True or false: a steering wheel is a wheel and axle. (a) False (b) True
11. 11.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) harder (d) impossible
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same
13. 13.True or false: a flagpole is a wheel and axle. (a) False (b) True
14. 14.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) the rope gets shorter (d) pulling down is easier
15. 15.⚙️ Which of these is a lever? (a) a doorknob (b) a bottle opener (c) a tap handle (d) a steering wheel
16. 16.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) on the flagpole (d) in the tap
17. 17.⚙️ Which of these is a lever? (a) a crane (b) a well pulley (c) a sloping road (d) a spoon lifting a lid
18. 18.🧺 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) yeast (d) an empty thread reel
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) yeast (d) a small paper cup
20. 20.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
21. 21.⚖️ 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
22. 22.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
23. 23.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
24. 24.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
25. 25.⚖️ 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
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) a small paper cup (d) a magnet
27. 27.True or false: a crowbar is a lever. (a) True (b) False
28. 28.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
29. 29.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a sloping road (c) a well pulley (d) a bottle opener
30. 30.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) double (d) the same
31. 31.⚙️ Which simple machine is a crowbar? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
32. 32.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
33. 33.True or false: a crane is an inclined plane. (a) True (b) False
34. 34.⚖️ 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) False (b) True
35. 35.True or false: string is needed for the thread-reel pulley. (a) True (b) False
36. 36.⚖️ 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 measure it (c) we change it
37. 37.⚙️ Which of these uses a pulley? (a) a tap handle (b) a sloping road (c) a flagpole (d) a see-saw
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) a battery cell (d) a pencil
39. 39.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
40. 40.⚖️ 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

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