Pulley STEM Project Worksheet

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

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