Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 422 · 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: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
3. 3.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) coins as the load (c) a pencil (d) string
6. 6.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it gets hot (d) it is magnetic
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) turmeric powder (c) a magnet (d) coins as the load
8. 8.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
9. 9.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 40 cm (d) 20 cm
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same
11. 11.⚖️ 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
12. 12.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
13. 13.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) yeast (c) an empty thread reel (d) string
15. 15.⚖️ 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 measure it (c) we keep it the same
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a battery cell (d) coins as the load
17. 17.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
18. 18.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a flagpole (c) a crowbar (d) a ramp
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) a pencil (d) a mirror
20. 20.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a magnet (d) coins as the load
22. 22.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a sloping road (c) a crowbar (d) a doorknob
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) a magnet (d) an empty thread reel
24. 24.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
25. 25.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
26. 26.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) rope (d) battery
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) the same string (c) how hard we must pull (d) number of pulleys
28. 28.⚖️ 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 measure it (c) we change it
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a mirror (c) a small paper cup (d) turmeric powder
30. 30.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
31. 31.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) the bucket floats (d) pulling down is easier
32. 32.⚖️ 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
33. 33.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) string (d) a battery cell
35. 35.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a flagpole (c) a doorknob (d) a bottle opener
36. 36.True or false: a see-saw is a lever. (a) True (b) False
37. 37.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a flagpole (c) a see-saw (d) a tap handle
38. 38.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same cup of coins (c) number of pulleys (d) the same string
40. 40.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False

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