Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 72 · 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 never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it could fall on you (d) it gets hot
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) a pencil (d) a mirror
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
5. 5.⚖️ 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 keep it the same (b) we measure it (c) we change it
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) coins as the load (c) string (d) an empty thread reel
8. 8.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
9. 9.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
10. 10.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
11. 11.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) adds weight (d) makes it magnetic
12. 12.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) how hard we must pull (c) the same cup of coins (d) the same string
14. 14.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
15. 15.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it turns blue (d) it gets wet
16. 16.🔮 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
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) a battery cell (d) a pencil
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) coins as the load (d) a pencil
19. 19.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) coins as the load (c) a pencil (d) a small paper cup
21. 21.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a ramp (c) a doorknob (d) a bottle opener
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) turmeric powder (c) string (d) a small paper cup
23. 23.⚖️ 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 measure it (b) we change it (c) we keep it the same
24. 24.⚙️ Which simple machine is a crowbar? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
25. 25.True or false: a slide is a wheel and axle. (a) False (b) True
26. 26.⚖️ 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 measure it (c) we change it
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) a small paper cup (c) an empty thread reel (d) string
28. 28.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
29. 29.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
30. 30.⚙️ Which simple machine is a see-saw? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) a small paper cup (d) yeast
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) the same cup of coins (d) the lifting height
33. 33.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) the rope gets shorter (d) water gets lighter
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) turmeric powder (d) a pencil
35. 35.⚖️ 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
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a mirror (c) an empty thread reel (d) string
37. 37.⚖️ 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) False (b) True
38. 38.🏗️ 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
39. 39.⚖️ 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
40. 40.⚖️ 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

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