Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 966 · 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? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
3. 3.⚙️ Which of these is a lever? (a) a crowbar (b) a slide (c) a ramp (d) a doorknob
4. 4.⚖️ 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) number of pulleys (c) the same string (d) the lifting height
5. 5.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer
6. 6.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) turmeric powder (d) a pencil
8. 8.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) impossible (d) the same
9. 9.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) halves the weight (d) makes it magnetic
10. 10.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
11. 11.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a mirror (c) a small paper cup (d) an empty thread reel
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
15. 15.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it might sing (d) it is magnetic
16. 16.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
17. 17.⚖️ 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) False (b) True
18. 18.⚖️ 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
19. 19.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 5 cm (d) 20 cm
20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) a balloon (d) a small paper cup
21. 21.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) the rope gets shorter (d) pulling down is easier
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) coins as the load (c) a small paper cup (d) an empty thread reel
23. 23.⚖️ 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
24. 24.True or false: a slide uses a pulley. (a) True (b) False
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a small paper cup (c) yeast (d) a battery cell
27. 27.⚖️ 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
28. 28.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
29. 29.True or false: a see-saw is a lever. (a) False (b) True
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) coins as the load (d) turmeric powder
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a mirror (c) a battery cell (d) yeast
32. 32.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
33. 33.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) coins as the load (d) a battery cell
35. 35.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
36. 36.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a sloping road (c) a crowbar (d) a tap handle
37. 37.True or false: string is needed for the thread-reel pulley. (a) False (b) True
38. 38.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
39. 39.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) a mirror (d) string

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