Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 922 · 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) 20 cm (b) 40 cm (c) 10 cm (d) 5 cm
2. 2.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we keep it the same (c) we measure it
4. 4.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) coins as the load (d) a magnet
6. 6.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
7. 7.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a balloon (c) a magnet (d) a mirror
9. 9.⚖️ 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
10. 10.True or false: a well pulley uses a pulley. (a) True (b) False
11. 11.⚖️ 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) how hard we must pull (c) the same string (d) the same cup of coins
12. 12.⚖️ 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
13. 13.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it is magnetic (d) it might sing
14. 14.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
15. 15.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) an empty thread reel (d) a balloon
17. 17.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
18. 18.True or false: a tap handle is a wheel and axle. (a) False (b) True
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) string (d) a balloon
20. 20.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the flagpole (c) in the tap (d) on the blackboard
21. 21.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a balloon (c) string (d) a mirror
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) yeast (d) coins as the load
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
25. 25.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
26. 26.⚖️ 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 same cup of coins
27. 27.True or false: string is needed for the thread-reel pulley. (a) True (b) False
28. 28.⚙️ Which of these is an inclined plane? (a) a crane (b) a flagpole (c) a doorknob (d) a ramp
29. 29.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a tap handle (c) a slide (d) a spoon lifting a lid
30. 30.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) easier (d) the same
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
32. 32.⚙️ Which of these is a lever? (a) a slide (b) a doorknob (c) a bottle opener (d) a well pulley
33. 33.⚖️ 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) False (b) True
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a mirror (c) turmeric powder (d) a magnet
35. 35.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) pulling down is easier (d) the rope gets shorter
36. 36.True or false: a crowbar uses a pulley. (a) False (b) True
37. 37.True or false: a see-saw is a lever. (a) True (b) False
38. 38.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
39. 39.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) battery (d) nail
40. 40.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it gets wet (d) it can hurt your finger

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