Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 166 · 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.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
2. 2.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
3. 3.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) a balloon (d) coins as the load
5. 5.⚖️ 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) the lifting height (c) number of pulleys (d) the same string
6. 6.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
7. 7.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) up (d) down
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a small paper cup (c) coins as the load (d) string
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) a battery cell (d) coins as the load
10. 10.⚖️ 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 same string (c) how hard we must pull (d) the lifting height
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the same string
12. 12.⚖️ 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
13. 13.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
14. 14.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
15. 15.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a balloon (c) string (d) an empty thread reel
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
18. 18.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
19. 19.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) magnet (d) rope
20. 20.⚖️ 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
21. 21.⚖️ 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 keep it the same (c) we measure it
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) string (c) a pencil (d) coins as the load
23. 23.True or false: a slide is an inclined plane. (a) False (b) True
24. 24.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) coins as the load (c) an empty thread reel (d) yeast
26. 26.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) pulling down is easier (d) the rope gets shorter
27. 27.⚖️ 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 keep it the same (b) we measure it (c) we change it
28. 28.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
29. 29.⚖️ 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
30. 30.🧺 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) an empty thread reel
31. 31.True or false: a crane is an inclined plane. (a) False (b) True
32. 32.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
33. 33.⚙️ Which of these uses a pulley? (a) a crane (b) a slide (c) a spoon lifting a lid (d) a bottle opener
34. 34.⚙️ Which of these is a lever? (a) a crowbar (b) a well pulley (c) a tap handle (d) a slide
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) turmeric powder (c) a small paper cup (d) coins as the load
36. 36.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
37. 37.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
38. 38.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
39. 39.True or false: a flagpole uses a pulley. (a) False (b) True
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) the lifting height (c) how hard we must pull

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