Pulley STEM Project Worksheet

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

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