Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 631 · 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.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) the same (d) impossible
2. 2.⚙️ Which of these is an inclined plane? (a) a slide (b) a crane (c) a well pulley (d) a bottle opener
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a mirror (c) a small paper cup (d) a pencil
4. 4.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) False (b) True
6. 6.True or false: a crowbar is a lever. (a) True (b) False
7. 7.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a see-saw (c) a crane (d) a ramp
8. 8.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a doorknob (c) a crane (d) a sloping road
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 change it (b) we keep it the same (c) we measure it
10. 10.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a mirror (c) string (d) turmeric powder
11. 11.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
12. 12.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
13. 13.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
14. 14.⚙️ Which of these is a lever? (a) a well pulley (b) a doorknob (c) a slide (d) a bottle opener
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) yeast (d) a small paper cup
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we change it (c) we measure it
17. 17.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) double (d) the same
18. 18.⚙️ Which of these is a lever? (a) a steering wheel (b) a tap handle (c) a spoon lifting a lid (d) a doorknob
19. 19.🏗️ 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
20. 20.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it can hurt your finger (d) it gets longer
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) a small paper cup (d) string
22. 22.⚖️ 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) True (b) False
23. 23.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) nail (d) battery
24. 24.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a battery cell (d) a small paper cup
26. 26.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) a magnet (d) an empty thread reel
28. 28.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
29. 29.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
30. 30.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
31. 31.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 5 cm (d) 10 cm
32. 32.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) a battery cell (d) an empty thread reel
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) coins as the load (c) a pencil (d) an empty thread reel
35. 35.True or false: string is needed for the thread-reel pulley. (a) True (b) False
36. 36.True or false: a tap handle uses a pulley. (a) False (b) True
37. 37.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
38. 38.True or false: a flagpole uses a pulley. (a) False (b) True
39. 39.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) number of pulleys (d) the same cup of coins

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