Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 855 · 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) string (b) a balloon (c) coins as the load (d) an empty thread reel
2. 2.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) adds weight (d) makes it magnetic
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) a balloon (d) coins as the load
4. 4.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a mirror (d) an empty thread reel
6. 6.True or false: a ramp is a lever. (a) False (b) True
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a pencil (d) turmeric powder
8. 8.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
9. 9.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
10. 10.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
11. 11.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it gets hot (d) it could fall on you
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) the lifting height (c) how hard we must pull (d) number of pulleys
13. 13.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
14. 14.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) yeast (c) string (d) a small paper cup
16. 16.⚙️ Which of these is a wheel and axle? (a) a crane (b) a see-saw (c) a doorknob (d) a crowbar
17. 17.⚖️ 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 keep it the same (b) we change it (c) we measure it
18. 18.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
19. 19.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the rope gets shorter (c) the bucket floats (d) water gets lighter
20. 20.⚖️ 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
21. 21.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
22. 22.⚖️ 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
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) yeast (c) an empty thread reel (d) a small paper cup
24. 24.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
25. 25.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
26. 26.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
27. 27.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) battery (d) nail
28. 28.True or false: a spoon lifting a lid is a lever. (a) True (b) False
29. 29.⚖️ 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 keep it the same (c) we change it
30. 30.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
31. 31.⚖️ 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
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) string (d) turmeric powder
33. 33.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
34. 34.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
35. 35.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it turns blue (d) it gets wet
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same cup of coins (c) how hard we must pull (d) number of pulleys
37. 37.True or false: a sloping road is a lever. (a) False (b) True
38. 38.⚙️ Which of these uses a pulley? (a) a well pulley (b) a sloping road (c) a crowbar (d) a slide
39. 39.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 20 cm (d) 5 cm
40. 40.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the bench (c) on the blackboard (d) in the tap

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