Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 917 · 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.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
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) number of pulleys (c) the lifting height (d) how hard we must pull
3. 3.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
4. 4.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the blackboard (c) on the flagpole (d) on the bench
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the lifting height
6. 6.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
7. 7.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
8. 8.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
9. 9.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
10. 10.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
11. 11.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
12. 12.⚖️ 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) True (b) False
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a battery cell (c) an empty thread reel (d) a small paper cup
14. 14.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) adds weight (d) makes it magnetic
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) False (b) True
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) string (d) turmeric powder
17. 17.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
18. 18.True or false: a ramp is a wheel and axle. (a) True (b) False
19. 19.True or false: a bottle opener uses a pulley. (a) True (b) False
20. 20.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
21. 21.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
22. 22.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a ramp (c) a tap handle (d) a crowbar
23. 23.⚖️ 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
24. 24.⚖️ 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
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True
26. 26.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
27. 27.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
28. 28.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) water gets lighter (d) pulling down is easier
29. 29.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
30. 30.True or false: a crane uses a pulley. (a) False (b) True
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) a mirror (d) string
32. 32.True or false: a slide uses a pulley. (a) False (b) True
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) a mirror (d) string
34. 34.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a bottle opener (c) a crane (d) a ramp
35. 35.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a see-saw (c) a slide (d) a well pulley
36. 36.True or false: a sloping road uses a pulley. (a) False (b) True
37. 37.🧺 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
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a small paper cup (d) yeast
39. 39.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
40. 40.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed

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