Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 580 · 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 small paper cup (b) an empty thread reel (c) a balloon (d) string
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) a magnet (d) turmeric powder
3. 3.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
4. 4.⚖️ 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
5. 5.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it is magnetic (d) it might sing
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) string (d) yeast
7. 7.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a mirror (c) a small paper cup (d) an empty thread reel
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a battery cell (c) a pencil (d) a balloon
10. 10.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the flagpole (c) on the blackboard (d) on the bench
11. 11.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
12. 12.True or false: a crane uses a pulley. (a) False (b) True
13. 13.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a bottle opener (c) a crane (d) a slide
14. 14.⚙️ Which simple machine is a sloping road? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
15. 15.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it gets longer (d) it turns blue
16. 16.⚖️ 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 measure it (b) we change it (c) we keep it the same
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) yeast (d) a small paper cup
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a magnet (d) a small paper cup
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) yeast (d) an empty thread reel
20. 20.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) string (c) an empty thread reel (d) a pencil
22. 22.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
23. 23.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) magnet (d) rope
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the same string (c) the lifting height (d) number of pulleys
25. 25.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
26. 26.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
27. 27.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
28. 28.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
29. 29.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
30. 30.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) False (b) True
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 measure it (b) we keep it the same (c) we change it
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
34. 34.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
35. 35.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) in a circle (d) up
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a small paper cup (d) a balloon
37. 37.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) makes it magnetic (d) adds weight
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
39. 39.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
40. 40.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed

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