Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 756 · 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? What do we do with “the same cup of coins”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.True or false: a flagpole uses a pulley. (a) True (b) False
3. 3.⚖️ 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) how hard we must pull (c) the same cup of coins
4. 4.True or false: a see-saw is a lever. (a) True (b) False
5. 5.⚖️ 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 cup of coins (c) how hard we must pull (d) the lifting height
6. 6.⚖️ 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
7. 7.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
8. 8.⚖️ 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
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a pencil (d) yeast
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) number of pulleys (c) the same string (d) the same cup of coins
11. 11.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) makes it magnetic (d) changes pull direction
12. 12.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) a balloon (d) an empty thread reel
15. 15.⚖️ 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
16. 16.True or false: a bottle opener is a wheel and axle. (a) True (b) False
17. 17.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
18. 18.⚙️ Which of these is a lever? (a) a steering wheel (b) a slide (c) a see-saw (d) a well pulley
19. 19.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
20. 20.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
21. 21.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) turmeric powder (d) string
23. 23.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) turmeric powder (d) an empty thread reel
25. 25.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
26. 26.True or false: string is needed for the thread-reel pulley. (a) True (b) False
27. 27.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a well pulley (c) a crowbar (d) a see-saw
28. 28.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
29. 29.⚙️ Which of these is a wheel and axle? (a) a crane (b) a flagpole (c) a sloping road (d) a tap handle
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 change it (b) we keep it the same (c) we measure it
31. 31.⚖️ 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
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a small paper cup (d) a mirror
33. 33.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) in the tap (c) on the blackboard (d) on the bench
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) a mirror (d) turmeric powder
35. 35.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a see-saw (c) a steering wheel (d) a slide
36. 36.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
37. 37.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
38. 38.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
39. 39.🛟 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
40. 40.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True

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