Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 324 · 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.🇮🇳 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
2. 2.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) down (d) up
3. 3.⚖️ 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
4. 4.True or false: a tap handle is a wheel and axle. (a) True (b) False
5. 5.⚙️ Which of these is a lever? (a) a crowbar (b) a well pulley (c) a doorknob (d) a tap handle
6. 6.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) a small paper cup (d) string
8. 8.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
9. 9.⚖️ 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 measure it (b) we change it (c) we keep it the same
10. 10.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it turns blue (d) it can hurt your finger
11. 11.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 40 cm (d) 5 cm
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) number of pulleys (c) the same string (d) the same cup of coins
13. 13.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
14. 14.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) turmeric powder (d) an empty thread reel
16. 16.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
17. 17.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
18. 18.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
19. 19.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
20. 20.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) an empty thread reel (d) a pencil
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a mirror (c) an empty thread reel (d) a small paper cup
23. 23.⚖️ 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
24. 24.⚖️ 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
25. 25.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
26. 26.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) yeast (d) a mirror
28. 28.True or false: a crane is an inclined plane. (a) True (b) False
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a small paper cup (c) an empty thread reel (d) coins as the load
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
31. 31.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
33. 33.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
34. 34.⚙️ Which of these is a lever? (a) a steering wheel (b) a flagpole (c) a see-saw (d) a crane
35. 35.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a balloon (c) an empty thread reel (d) a pencil
37. 37.⚖️ 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) False (b) True
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a battery cell (c) a magnet (d) yeast
39. 39.True or false: a sloping road is an inclined plane. (a) True (b) False
40. 40.True or false: a doorknob is a lever. (a) True (b) False

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