Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 562 · 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 what we measure? (a) number of pulleys (b) the lifting height (c) the same cup of coins (d) how hard we must pull
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) yeast (d) an empty thread reel
3. 3.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
4. 4.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
5. 5.⚖️ 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
6. 6.⚖️ 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) the same string (c) the same cup of coins (d) number of pulleys
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a battery cell (c) coins as the load (d) an empty thread reel
8. 8.⚖️ 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
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) coins as the load (c) string (d) an empty thread reel
10. 10.🛟 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
11. 11.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the flagpole (d) on the bench
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) an empty thread reel (d) a battery cell
13. 13.⚖️ 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
14. 14.True or false: a slide uses a pulley. (a) False (b) True
15. 15.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
16. 16.⚖️ 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) True (b) False
17. 17.True or false: a doorknob is an inclined plane. (a) True (b) False
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a balloon (d) coins as the load
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a small paper cup (c) string (d) coins as the load
20. 20.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a doorknob (c) a steering wheel (d) a slide
21. 21.True or false: a flagpole is an inclined plane. (a) True (b) False
22. 22.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
23. 23.True or false: a slide is a lever. (a) True (b) False
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
25. 25.⚖️ 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
26. 26.True or false: string is needed for the thread-reel pulley. (a) True (b) False
27. 27.True or false: a ramp is an inclined plane. (a) False (b) True
28. 28.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 40 cm (d) 10 cm
29. 29.⚙️ Which of these is a lever? (a) a see-saw (b) a steering wheel (c) a sloping road (d) a flagpole
30. 30.True or false: a see-saw is an inclined plane. (a) False (b) True
31. 31.True or false: a bottle opener is a lever. (a) True (b) False
32. 32.True or false: a crane is an inclined plane. (a) False (b) True
33. 33.⚖️ 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 keep it the same (b) we measure it (c) we change it
34. 34.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a steering wheel (c) a see-saw (d) a flagpole
35. 35.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
36. 36.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
37. 37.⚖️ 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
38. 38.True or false: a spoon lifting a lid is a lever. (a) True (b) False
39. 39.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
40. 40.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley

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