Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 227 · 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: coins as the load is needed for the thread-reel pulley. (a) False (b) True
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a balloon (d) an empty thread reel
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) yeast (c) a small paper cup (d) coins as the load
4. 4.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it might sing (d) it is magnetic
5. 5.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a ramp (c) a crane (d) a see-saw
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) True (b) False
7. 7.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
8. 8.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
9. 9.⚖️ 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 keep it the same (c) we change it
10. 10.⚙️ Which of these is a lever? (a) a crowbar (b) a crane (c) a well pulley (d) a tap handle
11. 11.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
12. 12.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) impossible (d) the same
13. 13.⚖️ 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 cup of coins (b) number of pulleys (c) the same string (d) how hard we must pull
14. 14.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
15. 15.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) pulling down is easier (d) water gets lighter
16. 16.True or false: a flagpole uses a pulley. (a) True (b) False
17. 17.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) a mirror (d) yeast
19. 19.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
20. 20.True or false: a sloping road is a wheel and axle. (a) False (b) True
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) an empty thread reel (d) a mirror
22. 22.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
23. 23.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) magnet (d) nail
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) turmeric powder (d) yeast
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the lifting height (c) the same cup of coins (d) how hard we must pull
26. 26.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) double (d) the same
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
28. 28.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
29. 29.True or false: a steering wheel is a wheel and axle. (a) True (b) False
30. 30.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
31. 31.⚖️ 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 change it (c) we measure it
32. 32.True or false: a doorknob is a wheel and axle. (a) False (b) True
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) turmeric powder (d) an empty thread reel
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) coins as the load (d) a magnet
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) yeast (d) coins as the load
36. 36.⚙️ Which of these is a lever? (a) a flagpole (b) a spoon lifting a lid (c) a slide (d) a ramp
37. 37.⚖️ 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 keep it the same (b) we change it (c) we measure it
38. 38.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
39. 39.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
40. 40.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed

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