Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 204 · 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 yeast for the thread-reel pulley? (a) needed (b) not needed
2. 2.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
3. 3.⚖️ 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
4. 4.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
5. 5.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a mirror (c) a battery cell (d) yeast
7. 7.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
8. 8.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a tap handle (c) a flagpole (d) a spoon lifting a lid
9. 9.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
10. 10.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it turns blue (d) it gets wet
11. 11.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
12. 12.⚖️ 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
13. 13.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a pencil (c) coins as the load (d) string
15. 15.True or false: a doorknob uses a pulley. (a) True (b) False
16. 16.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a crane (c) a spoon lifting a lid (d) a sloping road
17. 17.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
18. 18.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
19. 19.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) down (d) in a circle
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a magnet (d) an empty thread reel
21. 21.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 20 cm (d) 5 cm
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a battery cell (c) coins as the load (d) a pencil
23. 23.True or false: a doorknob is a lever. (a) True (b) False
24. 24.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
25. 25.⚖️ 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
26. 26.🧺 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 small paper cup (d) a balloon
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a small paper cup (c) an empty thread reel (d) a pencil
28. 28.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) harder (d) easier
29. 29.⚙️ Which of these uses a pulley? (a) a slide (b) a bottle opener (c) a well pulley (d) a spoon lifting a lid
30. 30.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
31. 31.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a steering wheel (c) a crane (d) a crowbar
32. 32.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
33. 33.⚖️ 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) the same cup of coins (c) the lifting height (d) number of pulleys
34. 34.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
35. 35.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) a small paper cup (d) a mirror
37. 37.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) an empty thread reel (d) yeast
40. 40.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a ramp (c) a steering wheel (d) a well pulley

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