Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 645 · 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.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it is magnetic (d) it might sing
2. 2.True or false: a tap handle is a wheel and axle. (a) True (b) False
3. 3.True or false: a well pulley uses a pulley. (a) False (b) True
4. 4.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
5. 5.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
6. 6.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
7. 7.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) a mirror (d) a magnet
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a pencil (c) string (d) a small paper cup
10. 10.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
11. 11.⚖️ 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 change it (c) we measure it
12. 12.⚖️ 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
13. 13.True or false: a slide is an inclined plane. (a) False (b) True
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) a magnet (d) string
15. 15.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
16. 16.⚖️ 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) how hard we must pull (c) the same cup of coins (d) the same string
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) string (d) a pencil
18. 18.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
19. 19.True or false: a bottle opener is an inclined plane. (a) True (b) False
20. 20.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
21. 21.⚙️ Which of these is a lever? (a) a crowbar (b) a flagpole (c) a doorknob (d) a ramp
22. 22.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
23. 23.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a steering wheel (c) a see-saw (d) a flagpole
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) coins as the load (d) turmeric powder
25. 25.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) nail (c) magnet (d) battery
26. 26.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
27. 27.True or false: a doorknob uses a pulley. (a) True (b) False
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) an empty thread reel (d) a magnet
29. 29.⚙️ Which of these is a lever? (a) a slide (b) a well pulley (c) a spoon lifting a lid (d) a ramp
30. 30.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
31. 31.⚖️ 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
32. 32.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
33. 33.⚖️ 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
34. 34.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
35. 35.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
36. 36.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) on the bench (d) in the tap
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) an empty thread reel (d) a small paper cup
38. 38.⚙️ Which of these is a lever? (a) a slide (b) a see-saw (c) a tap handle (d) a well pulley
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
40. 40.⚖️ 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

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