Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 448 · 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? Which of these is the one thing we change? (a) number of pulleys (b) the same string (c) how hard we must pull (d) the lifting height
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
3. 3.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it can hurt your finger (d) it turns blue
4. 4.⚙️ Which of these uses a pulley? (a) a slide (b) a flagpole (c) a crowbar (d) a tap handle
5. 5.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
6. 6.🏗️ 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
7. 7.⚖️ 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 lifting height (d) how hard we must pull
8. 8.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
9. 9.🧺 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 pencil (d) turmeric powder
10. 10.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) easier (d) the same
11. 11.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
12. 12.⚖️ 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 measure it (c) we keep it the same
13. 13.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
14. 14.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
15. 15.⚖️ 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 change it (b) we keep it the same (c) we measure it
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a balloon (d) string
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
18. 18.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
19. 19.🇮🇳 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
20. 20.⚙️ Which of these is a lever? (a) a well pulley (b) a bottle opener (c) a ramp (d) a slide
21. 21.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
22. 22.⚙️ Which of these is a wheel and axle? (a) a crane (b) a tap handle (c) a spoon lifting a lid (d) a see-saw
23. 23.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a sloping road (c) a steering wheel (d) a crowbar
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we keep it the same (c) we measure it
25. 25.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
26. 26.⚖️ 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
27. 27.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) coins as the load (c) a balloon (d) string
29. 29.⚙️ Which of these uses a pulley? (a) a crowbar (b) a sloping road (c) a well pulley (d) a tap handle
30. 30.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a see-saw (c) a crowbar (d) a steering wheel
31. 31.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
33. 33.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
34. 34.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
35. 35.⚙️ Which simple machine is a slide? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
36. 36.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
37. 37.True or false: a spoon lifting a lid is a lever. (a) True (b) False
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a mirror (c) an empty thread reel (d) a small paper cup
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) string (d) a small paper cup
40. 40.True or false: a tap handle uses a pulley. (a) False (b) True

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