Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 2 · 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.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
2. 2.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
3. 3.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
4. 4.⚖️ 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
5. 5.⚖️ 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 same cup of coins (c) the lifting height (d) number of pulleys
6. 6.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
7. 7.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) harder (d) impossible
8. 8.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
9. 9.⚖️ 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
10. 10.⚖️ 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 measure it (c) we change it
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a balloon (c) string (d) coins as the load
12. 12.⚙️ Which of these uses a pulley? (a) a see-saw (b) a slide (c) a crowbar (d) a well pulley
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a mirror (c) a battery cell (d) coins as the load
14. 14.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) the rope gets shorter (d) water gets lighter
15. 15.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) a balloon (d) a mirror
17. 17.True or false: a tap handle is a wheel and axle. (a) True (b) False
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) coins as the load (c) a small paper cup (d) a battery cell
19. 19.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
20. 20.⚖️ 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
21. 21.⚙️ Which of these uses a pulley? (a) a crane (b) a see-saw (c) a crowbar (d) a ramp
22. 22.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a magnet (d) a small paper cup
24. 24.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
25. 25.True or false: a crane is a lever. (a) True (b) False
26. 26.⚖️ 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
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) turmeric powder (d) yeast
28. 28.⚙️ Which of these uses a pulley? (a) a ramp (b) a bottle opener (c) a flagpole (d) a see-saw
29. 29.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a slide (c) a spoon lifting a lid (d) a see-saw
30. 30.⚖️ 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
31. 31.True or false: a crowbar uses a pulley. (a) False (b) True
32. 32.🛟 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
33. 33.True or false: a ramp uses a pulley. (a) True (b) False
34. 34.⚖️ 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 change it (c) we keep it the same
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) string (c) a pencil (d) a small paper cup
36. 36.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) on the flagpole (d) in the tap
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) a small paper cup (d) turmeric powder
38. 38.⚖️ 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 same string (c) the lifting height (d) how hard we must pull
39. 39.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
40. 40.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) up (d) sideways

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