Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 964 · 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) a magnet (b) coins as the load (c) a small paper cup (d) a pencil
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) coins as the load (c) an empty thread reel (d) a pencil
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) yeast (d) coins as the load
4. 4.🧺 Do we need an empty thread reel 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 change it (c) we measure it
6. 6.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
7. 7.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
8. 8.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
9. 9.True or false: a well pulley uses a pulley. (a) False (b) True
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 measure it (b) we change it (c) we keep it the same
11. 11.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
12. 12.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
13. 13.True or false: a sloping road is an inclined plane. (a) True (b) False
14. 14.True or false: a slide is a lever. (a) True (b) False
15. 15.⚙️ Which of these is a lever? (a) a bottle opener (b) a sloping road (c) a well pulley (d) a doorknob
16. 16.⚖️ 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
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a battery cell (c) string (d) a magnet
18. 18.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) halves the weight (d) changes pull direction
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) turmeric powder (d) coins as the load
20. 20.True or false: a crowbar is a lever. (a) False (b) True
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a mirror (c) a small paper cup (d) coins as the load
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 of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) coins as the load (d) yeast
24. 24.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
25. 25.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a steering wheel (c) a crowbar (d) a bottle opener
26. 26.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 20 cm (d) 10 cm
27. 27.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
28. 28.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) harder (d) impossible
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) the same string (c) how hard we must pull (d) number of pulleys
30. 30.⚖️ 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) False (b) True
31. 31.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
32. 32.⚖️ 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
33. 33.True or false: a see-saw is a lever. (a) False (b) True
34. 34.⚖️ 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
35. 35.True or false: a bottle opener is a wheel and axle. (a) True (b) False
36. 36.🛟 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
37. 37.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) down (d) up
38. 38.True or false: a doorknob is a wheel and axle. (a) False (b) True
39. 39.True or false: string is needed for the thread-reel pulley. (a) True (b) False
40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) a pencil (d) a mirror

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