Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 337 · 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.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) string (d) a pencil
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a balloon (c) a small paper cup (d) coins as the load
4. 4.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
5. 5.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
6. 6.True or false: a ramp is a wheel and axle. (a) False (b) True
7. 7.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) on the flagpole (d) in the tap
8. 8.🛟 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
9. 9.⚖️ 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
10. 10.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
11. 11.⚖️ 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
12. 12.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
13. 13.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) turmeric powder (d) a mirror
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) True (b) False
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) string (c) a pencil (d) an empty thread reel
18. 18.⚖️ 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
19. 19.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
20. 20.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
21. 21.⚙️ Which simple machine is a tap handle? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
22. 22.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
23. 23.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) yeast (d) an empty thread reel
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a mirror (c) an empty thread reel (d) coins as the load
26. 26.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a steering wheel (c) a well pulley (d) a see-saw
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) a small paper cup (d) turmeric powder
28. 28.True or false: a ramp is an inclined plane. (a) True (b) False
29. 29.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
30. 30.⚖️ 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 keep it the same (c) we measure it
31. 31.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) easier (d) the same
32. 32.True or false: a tap handle is a wheel and axle. (a) True (b) False
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) a battery cell (d) a magnet
34. 34.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
35. 35.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
36. 36.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a doorknob (c) a ramp (d) a crane
37. 37.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) how hard we must pull (c) number of pulleys (d) the same string
39. 39.⚖️ 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 same string (c) number of pulleys
40. 40.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False

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