Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 805 · 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.True or false: a slide is an inclined plane. (a) True (b) False
2. 2.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) in the tap (d) on the flagpole
3. 3.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
4. 4.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it could fall on you (d) it is magnetic
5. 5.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) coins as the load (c) an empty thread reel (d) string
6. 6.⚖️ 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 string (c) the same cup of coins (d) how hard we must pull
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) number of pulleys (c) the same string (d) how hard we must pull
8. 8.⚖️ 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
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) coins as the load (d) a mirror
10. 10.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a bottle opener (c) a steering wheel (d) a slide
11. 11.⚖️ 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
12. 12.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
13. 13.⚙️ Which of these is a lever? (a) a sloping road (b) a bottle opener (c) a crane (d) a tap handle
14. 14.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
15. 15.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
16. 16.⚖️ 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
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 change it (c) we measure it
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
19. 19.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) pulling down is easier (d) the bucket floats
20. 20.⚖️ 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
21. 21.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) down (d) in a circle
22. 22.True or false: a crowbar uses a pulley. (a) False (b) True
23. 23.⚙️ Which of these is a wheel and axle? (a) a crane (b) a ramp (c) a tap handle (d) a crowbar
24. 24.⚖️ 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) the same cup of coins (c) how hard we must pull
25. 25.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
26. 26.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
27. 27.⚙️ Which of these uses a pulley? (a) a slide (b) a spoon lifting a lid (c) a crane (d) a tap handle
28. 28.⚙️ Which of these uses a pulley? (a) a ramp (b) a slide (c) a flagpole (d) a steering wheel
29. 29.True or false: a doorknob is a wheel and axle. (a) True (b) False
30. 30.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) battery (d) magnet
31. 31.⚖️ 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
32. 32.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it gets wet (d) it can hurt your finger
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) turmeric powder (d) an empty thread reel
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) yeast (c) a pencil (d) a small paper cup
35. 35.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
36. 36.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
37. 37.⚖️ 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
38. 38.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
39. 39.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a spoon lifting a lid (c) a steering wheel (d) a sloping road
40. 40.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane

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