Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 489 · 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 bench (b) in the tap (c) on the flagpole (d) on the blackboard
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
3. 3.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 40 cm (d) 10 cm
4. 4.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
5. 5.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
6. 6.⚙️ Which simple machine is a crane? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) coins as the load (d) a mirror
8. 8.⚖️ 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 keep it the same (c) we change it
9. 9.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
10. 10.⚖️ 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
11. 11.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
12. 12.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
13. 13.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) nail (d) magnet
14. 14.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
16. 16.🏗️ 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
17. 17.⚙️ Which simple machine is a crowbar? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
18. 18.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a ramp (c) a doorknob (d) a see-saw
19. 19.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
20. 20.⚙️ Which of these is a lever? (a) a flagpole (b) a slide (c) a tap handle (d) a bottle opener
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a battery cell (d) an empty thread reel
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) False (b) True
23. 23.🛟 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
24. 24.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) in a circle (d) up
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) a magnet (d) string
26. 26.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) turmeric powder (c) coins as the load (d) string
28. 28.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
29. 29.⚖️ 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) the lifting height (c) number of pulleys
30. 30.⚙️ Which simple machine is a see-saw? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) a small paper cup (d) a balloon
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a magnet (d) a pencil
33. 33.⚖️ 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) the lifting height (d) how hard we must pull
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a pencil (c) a mirror (d) yeast
35. 35.⚖️ 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
36. 36.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) a mirror (d) a balloon
38. 38.⚖️ 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) False (b) True
39. 39.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
40. 40.True or false: a flagpole uses a pulley. (a) True (b) False

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