Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 778 · 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 well pulley uses a pulley. (a) True (b) False
2. 2.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 5 cm (d) 20 cm
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) turmeric powder (d) coins as the load
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) an empty thread reel (c) a small paper cup (d) coins as the load
5. 5.True or false: a crane is a wheel and axle. (a) False (b) True
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) yeast (c) coins as the load (d) a battery cell
7. 7.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) number of pulleys (c) how hard we must pull
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a pencil (c) a small paper cup (d) coins as the load
10. 10.⚖️ 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 measure it (c) we keep it the same
11. 11.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
12. 12.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) double (d) zero
14. 14.True or false: a slide is an inclined plane. (a) True (b) False
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a pencil (d) a battery cell
16. 16.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
17. 17.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) impossible (d) easier
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) a balloon (d) coins as the load
19. 19.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
20. 20.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it turns blue (d) it gets wet
21. 21.⚖️ 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 keep it the same (c) we measure it
22. 22.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
23. 23.⚙️ Which of these is a lever? (a) a well pulley (b) a bottle opener (c) a sloping road (d) a ramp
24. 24.⚖️ 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) the same cup of coins (c) the lifting height (d) the same string
25. 25.True or false: a crane is a lever. (a) True (b) False
26. 26.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
27. 27.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) battery (d) rope
28. 28.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) string (c) a balloon (d) turmeric powder
30. 30.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a crowbar (c) a well pulley (d) a ramp
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) a small paper cup (c) an empty thread reel (d) string
32. 32.True or false: a doorknob is a wheel and axle. (a) True (b) False
33. 33.⚖️ 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
34. 34.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a slide (c) a doorknob (d) a flagpole
35. 35.True or false: a see-saw is an inclined plane. (a) True (b) False
36. 36.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the bucket floats (d) the rope gets shorter
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) False (b) True
38. 38.⚖️ 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
39. 39.⚙️ Which simple machine is a sloping road? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
40. 40.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle

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