Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 109 · 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.⚖️ 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
2. 2.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) rope (d) magnet
3. 3.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
4. 4.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
5. 5.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
6. 6.⚖️ 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 change it (c) we measure it
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a magnet (d) an empty thread reel
8. 8.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a sloping road (c) a crane (d) a bottle opener
9. 9.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
10. 10.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
11. 11.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
12. 12.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
13. 13.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a crane (c) a doorknob (d) a sloping road
14. 14.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
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) how hard we must pull (c) number of pulleys (d) the lifting height
16. 16.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a crowbar (c) a see-saw (d) a well pulley
17. 17.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
18. 18.⚙️ Which of these is a lever? (a) a slide (b) a doorknob (c) a steering wheel (d) a see-saw
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) a battery cell (d) a small paper cup
20. 20.⚖️ 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 keep it the same (c) we measure it
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) a battery cell (d) yeast
22. 22.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
23. 23.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) the same (d) zero
24. 24.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it can hurt your finger (d) it gets longer
25. 25.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) impossible (d) easier
26. 26.True or false: a crane uses a pulley. (a) True (b) False
27. 27.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
28. 28.⚙️ Which of these uses a pulley? (a) a doorknob (b) a flagpole (c) a steering wheel (d) a crowbar
29. 29.True or false: string is needed for the thread-reel pulley. (a) True (b) False
30. 30.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
31. 31.True or false: a doorknob is a lever. (a) False (b) True
32. 32.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
33. 33.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) True (b) False
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) a battery cell (d) coins as the load
36. 36.⚖️ 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
37. 37.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
38. 38.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) the rope gets shorter (d) pulling down is easier
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
40. 40.⚖️ 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 change it (b) we keep it the same (c) we measure it

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