Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 121 · 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 of these is a wheel and axle? (a) a steering wheel (b) a crane (c) a bottle opener (d) a spoon lifting a lid
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) zero (d) double
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) string (c) a battery cell (d) turmeric powder
4. 4.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
5. 5.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 20 cm (d) 5 cm
6. 6.⚖️ 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
7. 7.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) a battery cell (d) an empty thread reel
9. 9.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
10. 10.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
11. 11.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a well pulley (c) a doorknob (d) a tap handle
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) how hard we must pull (c) number of pulleys
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) turmeric powder (c) coins as the load (d) string
14. 14.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) battery (c) nail (d) magnet
15. 15.⚙️ Which of these is a lever? (a) a crane (b) a spoon lifting a lid (c) a well pulley (d) a doorknob
16. 16.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
17. 17.⚖️ 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 lifting height (c) how hard we must pull (d) the same string
18. 18.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
19. 19.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
21. 21.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
22. 22.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a ramp (c) a sloping road (d) a crowbar
23. 23.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
24. 24.True or false: a see-saw uses a pulley. (a) False (b) True
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a balloon (d) yeast
26. 26.True or false: a crane uses a pulley. (a) True (b) False
27. 27.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
29. 29.True or false: a crowbar is an inclined plane. (a) True (b) False
30. 30.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a pencil (c) a balloon (d) a magnet
32. 32.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) a balloon (d) string
34. 34.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) an empty thread reel (d) a mirror
36. 36.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
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 measure it (b) we change it (c) we keep it the same
38. 38.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) turmeric powder (d) a battery cell
40. 40.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False

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