Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 215 · 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.🛟 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
2. 2.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) water gets lighter (d) the rope gets shorter
3. 3.🔮 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
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) a pencil (d) yeast
5. 5.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) changes pull direction (d) makes it magnetic
6. 6.⚖️ 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
7. 7.⚖️ 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) the lifting height (c) number of pulleys
8. 8.⚖️ 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
9. 9.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
10. 10.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
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 keep it the same (b) we change it (c) we measure it
12. 12.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a well pulley (c) a see-saw (d) a slide
13. 13.True or false: a crowbar uses a pulley. (a) False (b) True
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a mirror (c) coins as the load (d) an empty thread reel
15. 15.⚖️ 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 string (b) number of pulleys (c) how hard we must pull (d) the lifting height
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) coins as the load (d) a magnet
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a mirror (c) yeast (d) a battery cell
18. 18.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a bottle opener (c) a steering wheel (d) a well pulley
19. 19.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
20. 20.True or false: a crane is an inclined plane. (a) True (b) False
21. 21.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
22. 22.⚖️ 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) the lifting height (c) number of pulleys (d) the same string
23. 23.True or false: a well pulley is a lever. (a) True (b) False
24. 24.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
25. 25.True or false: a doorknob is a wheel and axle. (a) False (b) True
26. 26.⚙️ Which simple machine is a well pulley? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
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 change it (b) we measure it (c) we keep it the same
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
29. 29.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a steering wheel (c) a crowbar (d) a ramp
30. 30.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) coins as the load (d) a balloon
32. 32.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
33. 33.True or false: a ramp is a wheel and axle. (a) False (b) True
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) an empty thread reel (d) turmeric powder
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a battery cell (c) string (d) an empty thread reel
37. 37.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
38. 38.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) a battery cell (d) an empty thread reel
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same

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