Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 546 · 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.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
2. 2.⚖️ 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
3. 3.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) yeast (d) a battery cell
5. 5.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) easier (d) the same
6. 6.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
7. 7.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
8. 8.True or false: a doorknob is an inclined plane. (a) False (b) True
9. 9.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the rope gets shorter (c) the bucket floats (d) pulling down is easier
10. 10.True or false: a slide is an inclined plane. (a) False (b) True
11. 11.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets wet (d) it gets longer
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a small paper cup (d) a balloon
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a balloon (c) turmeric powder (d) a battery cell
14. 14.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
15. 15.⚖️ 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
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) coins as the load (c) string (d) an empty thread reel
17. 17.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) number of pulleys (c) the lifting height (d) the same string
19. 19.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
20. 20.True or false: a steering wheel is an inclined plane. (a) True (b) False
21. 21.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it gets hot (d) it could fall on you
22. 22.⚖️ 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) number of pulleys (c) how hard we must pull (d) the lifting height
23. 23.⚙️ Which of these is a wheel and axle? (a) a crane (b) a see-saw (c) a steering wheel (d) a spoon lifting a lid
24. 24.⚖️ 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
25. 25.⚙️ Which of these is a lever? (a) a tap handle (b) a bottle opener (c) a ramp (d) a crane
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a pencil (c) yeast (d) a balloon
27. 27.⚙️ Which of these uses a pulley? (a) a tap handle (b) a ramp (c) a slide (d) a crane
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) turmeric powder (c) a mirror (d) a magnet
29. 29.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) coins as the load (d) turmeric powder
31. 31.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
32. 32.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
33. 33.True or false: a crowbar is a lever. (a) False (b) True
34. 34.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
35. 35.True or false: a well pulley is a lever. (a) True (b) False
36. 36.⚖️ 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
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a magnet (d) a pencil
38. 38.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
39. 39.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
40. 40.⚖️ 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

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