Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 712 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a pencil (c) coins as the load (d) an empty thread reel
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) turmeric powder (d) a small paper cup
3. 3.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
4. 4.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a magnet (d) a small paper cup
6. 6.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
7. 7.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) a balloon (d) yeast
9. 9.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we measure it (c) we change it
11. 11.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) about half (d) the same
12. 12.⚖️ 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
13. 13.⚖️ 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) how hard we must pull (c) the lifting height
14. 14.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) pulling down is easier (d) water gets lighter
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
16. 16.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets longer (d) it gets wet
17. 17.True or false: a flagpole is a wheel and axle. (a) False (b) True
18. 18.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
19. 19.True or false: a flagpole is an inclined plane. (a) True (b) False
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) yeast (c) a pencil (d) a small paper cup
22. 22.⚖️ 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 same string (c) the lifting height (d) number of pulleys
23. 23.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
24. 24.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
25. 25.⚖️ 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
26. 26.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) easier (d) impossible
27. 27.True or false: a steering wheel is an inclined plane. (a) True (b) False
28. 28.⚖️ 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 change it (c) we measure it
29. 29.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
30. 30.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
31. 31.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
32. 32.⚖️ 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
33. 33.⚙️ Which of these uses a pulley? (a) a see-saw (b) a crane (c) a sloping road (d) a bottle opener
34. 34.⚖️ 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
35. 35.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
36. 36.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a slide (c) a spoon lifting a lid (d) a flagpole
37. 37.True or false: a steering wheel is a wheel and axle. (a) True (b) False
38. 38.True or false: a ramp is an inclined plane. (a) True (b) False
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
40. 40.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a flagpole (c) a crowbar (d) a sloping road

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