Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 101 · 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.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) False (b) True
2. 2.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
3. 3.⚙️ Which simple machine is a crane? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) string (d) a mirror
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) coins as the load (d) a magnet
6. 6.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
7. 7.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a mirror (c) string (d) coins as the load
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) an empty thread reel (c) a small paper cup (d) string
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) False (b) True
11. 11.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
12. 12.True or false: a pencil is 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 wheel and axle (c) an inclined plane (d) a pulley
14. 14.⚖️ 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
15. 15.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
16. 16.True or false: a see-saw is an inclined plane. (a) True (b) False
17. 17.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
18. 18.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a steering wheel (c) a crane (d) a ramp
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) a small paper cup (d) turmeric powder
20. 20.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
21. 21.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a crane (c) a sloping road (d) a ramp
22. 22.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
23. 23.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a small paper cup (d) coins as the load
25. 25.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
26. 26.⚖️ 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) number of pulleys (d) the same string
27. 27.⚖️ 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
28. 28.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) a pencil (d) a mirror
31. 31.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a doorknob (c) a crane (d) a bottle opener
32. 32.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
33. 33.True or false: a see-saw is a lever. (a) False (b) True
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) an empty thread reel (d) a balloon
35. 35.True or false: a slide is an inclined plane. (a) False (b) True
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 measure it (b) we change it (c) we keep it the same
37. 37.⚖️ 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
38. 38.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
39. 39.⚖️ 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) True (b) False
40. 40.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the blackboard (c) on the bench (d) on the flagpole

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