Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 686 · 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 see-saw is a lever. (a) True (b) False
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) yeast (d) a small paper cup
3. 3.True or false: a doorknob is a wheel and axle. (a) True (b) False
4. 4.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
5. 5.True or false: a steering wheel is a wheel and axle. (a) True (b) False
6. 6.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
7. 7.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
8. 8.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we keep it the same (c) we change it
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a balloon (c) a pencil (d) a small paper cup
11. 11.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
12. 12.🧺 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) a magnet (d) an empty thread reel
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a pencil (c) a small paper cup (d) string
14. 14.True or false: a ramp is an inclined plane. (a) False (b) True
15. 15.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it might sing (d) it gets hot
16. 16.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
17. 17.⚙️ Which simple machine is a crowbar? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) yeast (c) a balloon (d) string
19. 19.⚖️ 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) number of pulleys (c) how hard we must pull (d) the same string
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) yeast (c) an empty thread reel (d) a balloon
21. 21.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a flagpole (c) a see-saw (d) a ramp
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) turmeric powder (c) an empty thread reel (d) coins as the load
23. 23.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a pencil (d) a small paper cup
25. 25.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
26. 26.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
27. 27.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same string (b) number of pulleys (c) the lifting height (d) how hard we must pull
29. 29.⚖️ 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 measure it (b) we keep it the same (c) we change it
30. 30.⚖️ 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) True (b) False
31. 31.⚖️ 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
32. 32.True or false: a crowbar is a lever. (a) False (b) True
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a battery cell (d) string
34. 34.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
35. 35.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
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 change it (b) we keep it the same (c) we measure it
37. 37.⚖️ 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) the same string (c) how hard we must pull
38. 38.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a doorknob (c) a well pulley (d) a ramp
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a small paper cup (c) string (d) an empty thread reel
40. 40.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) the bucket floats (d) pulling down is easier

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