Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 782 · 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? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the same string
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a battery cell (d) a small paper cup
3. 3.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
4. 4.True or false: a flagpole is a wheel and axle. (a) True (b) False
5. 5.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
6. 6.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
7. 7.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) a mirror (d) a pencil
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) string (c) a pencil (d) coins as the load
11. 11.⚖️ 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
12. 12.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) pulling down is easier (d) the rope gets shorter
13. 13.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
14. 14.⚖️ 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
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) a small paper cup (d) a battery cell
16. 16.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
17. 17.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
18. 18.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it could fall on you (d) it gets hot
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) a pencil (d) a mirror
20. 20.⚖️ 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) the same cup of coins (d) the lifting height
21. 21.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 10 cm (d) 5 cm
22. 22.⚖️ 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) False (b) True
23. 23.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) a magnet (d) a pencil
24. 24.⚙️ Which of these is a lever? (a) a well pulley (b) a flagpole (c) a spoon lifting a lid (d) a steering wheel
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
26. 26.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
27. 27.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) an empty thread reel (c) a balloon (d) yeast
29. 29.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) yeast (d) a balloon
31. 31.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
32. 32.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
33. 33.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
34. 34.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
35. 35.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) battery (c) magnet (d) nail
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) a balloon (d) a pencil
37. 37.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
38. 38.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
39. 39.True or false: a see-saw is a lever. (a) False (b) True
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True

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