Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 492 · 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) impossible (b) the same (c) harder (d) easier
2. 2.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a small paper cup (d) yeast
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) coins as the load (c) an empty thread reel (d) string
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) a small paper cup (d) a mirror
6. 6.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it turns blue (d) it gets wet
7. 7.⚖️ 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
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) a pencil (d) turmeric powder
9. 9.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) the rope gets shorter (d) pulling down is easier
10. 10.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
11. 11.⚖️ 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
12. 12.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
13. 13.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
14. 14.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) True (b) False
16. 16.True or false: a doorknob is an inclined plane. (a) False (b) True
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) turmeric powder (d) coins as the load
18. 18.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a see-saw (c) a tap handle (d) a sloping road
19. 19.⚙️ Which of these is a lever? (a) a crane (b) a bottle opener (c) a well pulley (d) a flagpole
20. 20.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
21. 21.True or false: a steering wheel is a wheel and axle. (a) True (b) False
22. 22.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
23. 23.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
24. 24.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 5 cm (d) 20 cm
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the same cup of coins (c) how hard we must pull (d) the same string
26. 26.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
27. 27.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
28. 28.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) turmeric powder (c) a magnet (d) a mirror
30. 30.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the bench (d) on the flagpole
31. 31.⚖️ 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
32. 32.⚖️ 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
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) string (c) an empty thread reel (d) coins as the load
34. 34.True or false: a slide is an inclined plane. (a) False (b) True
35. 35.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) in a circle (d) down
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
37. 37.True or false: string is needed for the thread-reel pulley. (a) False (b) True
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) a small paper cup (c) coins as the load (d) an empty thread reel
39. 39.⚙️ Which of these is an inclined plane? (a) a slide (b) a crowbar (c) a crane (d) a well pulley
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) yeast (d) turmeric powder

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