Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 874 · 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.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the flagpole (c) on the bench (d) on the blackboard
3. 3.🏗️ 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
4. 4.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
5. 5.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
6. 6.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a slide (c) a sloping road (d) a steering wheel
7. 7.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a doorknob (c) a flagpole (d) a slide
8. 8.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
9. 9.🧺 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 battery cell (d) string
10. 10.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
11. 11.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
12. 12.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) changes pull direction (d) adds weight
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a balloon (d) an empty thread reel
14. 14.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a well pulley (c) a tap handle (d) a slide
15. 15.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it could fall on you (d) it gets hot
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 keep it the same (b) we measure it (c) we change it
17. 17.🏗️ 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
18. 18.⚖️ 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 change it (c) we keep it the same
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) coins as the load (d) yeast
20. 20.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
21. 21.🧺 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
22. 22.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
23. 23.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a magnet (d) a small paper cup
24. 24.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) a battery cell (d) a mirror
26. 26.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
29. 29.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
30. 30.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
31. 31.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
32. 32.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
33. 33.⚖️ 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) the lifting height (c) the same cup of coins (d) number of pulleys
34. 34.True or false: a steering wheel is a wheel and axle. (a) False (b) True
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a pencil (d) turmeric powder
36. 36.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
37. 37.⚖️ 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) the lifting height (c) the same cup of coins (d) how hard we must pull
38. 38.🧺 Do we need a magnet 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? True or false: the same cup of coins is the one thing we change. (a) False (b) True
40. 40.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed

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