Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 336 · 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.🧺 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) a pencil
2. 2.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it could fall on you (d) it gets hot
3. 3.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the bench (c) on the blackboard (d) on the flagpole
4. 4.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) harder (d) impossible
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the lifting height (c) how hard we must pull (d) the same string
6. 6.⚙️ Which simple machine is a tap handle? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
7. 7.True or false: a crowbar uses a pulley. (a) True (b) False
8. 8.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it can hurt your finger (d) it gets longer
9. 9.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) up (d) down
10. 10.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a well pulley (c) a doorknob (d) a see-saw
11. 11.⚖️ 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 cup of coins (c) how hard we must pull (d) the same string
12. 12.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
13. 13.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
14. 14.⚖️ 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 keep it the same (c) we change it
15. 15.True or false: string is needed for the thread-reel pulley. (a) True (b) False
16. 16.True or false: a crane is an inclined plane. (a) False (b) True
17. 17.⚖️ 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
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) string (d) a magnet
19. 19.⚖️ 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
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a battery cell (c) string (d) a balloon
21. 21.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) yeast (d) a magnet
23. 23.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
24. 24.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) an empty thread reel (d) a balloon
26. 26.True or false: a bottle opener is a lever. (a) False (b) True
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) a battery cell (d) a magnet
28. 28.⚖️ 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
29. 29.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) pulling down is easier (c) the bucket floats (d) water gets lighter
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) an empty thread reel (d) yeast
32. 32.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
33. 33.⚖️ 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
34. 34.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
35. 35.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a well pulley (c) a crane (d) a steering wheel
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) turmeric powder (c) a small paper cup (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 what we measure. (a) True (b) False
38. 38.⚙️ Which of these is an inclined plane? (a) a crane (b) a tap handle (c) a sloping road (d) a bottle opener
39. 39.⚖️ 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
40. 40.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a tap handle (c) a crane (d) a slide

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