Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 670 · 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.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) coins as the load (d) a mirror
2. 2.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) a small paper cup (c) string (d) an empty thread reel
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) turmeric powder (c) a magnet (d) yeast
5. 5.⚖️ 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) number of pulleys (c) the lifting height (d) how hard we must pull
6. 6.⚙️ Which of these uses a pulley? (a) a see-saw (b) a doorknob (c) a well pulley (d) a steering wheel
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) yeast (d) a small paper cup
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a balloon (d) a pencil
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) an empty thread reel (c) a pencil (d) coins as the load
10. 10.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it could fall on you (d) it is magnetic
11. 11.True or false: string is needed for the thread-reel pulley. (a) True (b) False
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
13. 13.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a slide (c) a see-saw (d) a tap handle
14. 14.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 40 cm (d) 10 cm
15. 15.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) on the bench (d) in the tap
16. 16.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
17. 17.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a steering wheel (c) a slide (d) a crane
18. 18.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
19. 19.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
20. 20.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it gets wet (d) it can hurt your finger
21. 21.⚖️ 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) False (b) True
22. 22.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) battery (c) nail (d) magnet
23. 23.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) impossible (d) easier
24. 24.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
25. 25.⚖️ 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
26. 26.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
27. 27.⚖️ 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 keep it the same (c) we measure it
28. 28.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a battery cell (c) an empty thread reel (d) a pencil
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) a pencil (d) a balloon
31. 31.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the bucket floats (d) the rope gets shorter
32. 32.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
33. 33.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) yeast (d) coins as the load
35. 35.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
36. 36.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
37. 37.True or false: a flagpole is a lever. (a) True (b) False
38. 38.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) halves the weight (d) changes pull direction
39. 39.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
40. 40.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed

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