Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 990 · 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 battery cell for the thread-reel pulley? (a) not needed (b) needed
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) about half (d) the same
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) a small paper cup (d) a mirror
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) coins as the load (d) a mirror
5. 5.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
6. 6.⚖️ 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) number of pulleys (c) the same cup of coins
7. 7.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) water gets lighter (d) pulling down is easier
8. 8.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 40 cm (d) 5 cm
9. 9.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same
11. 11.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
12. 12.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) battery (c) magnet (d) nail
13. 13.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
14. 14.⚖️ 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) the same string (d) how hard we must pull
15. 15.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
16. 16.⚙️ Which of these uses a pulley? (a) a doorknob (b) a crane (c) a steering wheel (d) a crowbar
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) an empty thread reel (d) a small paper cup
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.🧺 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
20. 20.⚙️ Which of these is an inclined plane? (a) a ramp (b) a crowbar (c) a bottle opener (d) a steering wheel
21. 21.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
22. 22.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
23. 23.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a crowbar (c) a slide (d) a doorknob
24. 24.⚖️ 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 measure it (c) we change it
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we measure it (b) we change it (c) we keep it the same
26. 26.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
27. 27.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
28. 28.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) a mirror (d) an empty thread reel
30. 30.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it is magnetic (d) it gets hot
31. 31.⚖️ 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 measure it (c) we keep it the same
32. 32.True or false: a flagpole is an inclined plane. (a) False (b) True
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) the same string (b) number of pulleys (c) the lifting height (d) the same cup of coins
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) string (d) a balloon
35. 35.⚖️ 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
36. 36.⚙️ Which of these is a lever? (a) a doorknob (b) a crane (c) a see-saw (d) a slide
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a pencil (c) yeast (d) a magnet
38. 38.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
39. 39.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) coins as the load (d) a balloon

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