Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 576 · 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.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) easier (d) impossible
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a mirror (d) coins as the load
3. 3.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
4. 4.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) water gets lighter (c) the rope gets shorter (d) the bucket floats
5. 5.True or false: a steering wheel is a wheel and axle. (a) False (b) True
6. 6.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) a magnet (d) a battery cell
8. 8.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a doorknob (c) a slide (d) a flagpole
9. 9.🔮 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
10. 10.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) a small paper cup (d) turmeric powder
11. 11.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
12. 12.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it is magnetic (d) it gets hot
13. 13.True or false: a crane uses a pulley. (a) False (b) True
14. 14.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) on the bench (d) in the tap
15. 15.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it gets wet (d) it can hurt your finger
16. 16.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a crane (c) a steering wheel (d) a flagpole
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a mirror (c) an empty thread reel (d) yeast
18. 18.⚙️ Which of these uses a pulley? (a) a ramp (b) a see-saw (c) a flagpole (d) a doorknob
19. 19.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
20. 20.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a mirror (d) a pencil
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) an empty thread reel (d) yeast
23. 23.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
24. 24.⚖️ 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
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) turmeric powder (d) an empty thread reel
26. 26.True or false: a slide is a lever. (a) False (b) True
27. 27.⚙️ Which of these is a lever? (a) a sloping road (b) a crane (c) a doorknob (d) a bottle opener
28. 28.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
29. 29.⚖️ 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 measure it (c) we keep it the same
30. 30.True or false: a balloon 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? What do we do with “the lifting height”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) nail (d) magnet
33. 33.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a balloon (c) a pencil (d) an empty thread reel
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) coins as the load (c) string (d) a small paper cup
36. 36.⚙️ Which of these uses a pulley? (a) a crane (b) a ramp (c) a doorknob (d) a sloping road
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the lifting height (c) number of pulleys (d) the same string
38. 38.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
39. 39.⚖️ 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 string (b) number of pulleys (c) the same cup of coins (d) the lifting height
40. 40.⚖️ 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) True (b) False

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