Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 758 · 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.⚙️ Which simple machine is a well pulley? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a mirror (c) a pencil (d) a small paper cup
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.🧺 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 battery cell
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.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it turns blue (d) it can hurt your finger
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) turmeric powder (c) a small paper cup (d) string
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) a magnet (d) turmeric powder
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) yeast (d) a mirror
10. 10.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
11. 11.True or false: a flagpole uses a pulley. (a) False (b) True
12. 12.⚙️ Which of these uses a pulley? (a) a flagpole (b) a slide (c) a spoon lifting a lid (d) a steering wheel
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a balloon (d) a pencil
14. 14.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
15. 15.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
16. 16.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 10 cm (d) 20 cm
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) number of pulleys (c) the lifting height (d) the same cup of coins
18. 18.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a crane (c) a tap handle (d) a spoon lifting a lid
19. 19.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) magnet (d) rope
20. 20.True or false: a tap handle is an inclined plane. (a) True (b) False
21. 21.⚙️ Which of these is a lever? (a) a steering wheel (b) a spoon lifting a lid (c) a flagpole (d) a ramp
22. 22.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) easier (d) the same
23. 23.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
24. 24.⚖️ 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
25. 25.⚖️ 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
26. 26.True or false: a ramp is an inclined plane. (a) False (b) True
27. 27.⚙️ Which of these is a lever? (a) a doorknob (b) a tap handle (c) a crowbar (d) a slide
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) a pencil (d) coins as the load
29. 29.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a ramp (c) a crowbar (d) a well pulley
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a magnet (c) string (d) a pencil
33. 33.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) an empty thread reel (c) coins as the load (d) string
35. 35.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
36. 36.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
37. 37.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a doorknob (c) a bottle opener (d) a sloping road
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) yeast (c) an empty thread reel (d) a small paper cup
39. 39.⚖️ 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
40. 40.True or false: a slide uses a pulley. (a) False (b) True

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