Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 902 · 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) the same cup of coins (b) how hard we must pull (c) the same string (d) number of pulleys
2. 2.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
3. 3.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it turns blue (d) it gets wet
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
5. 5.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) impossible (d) the same
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a balloon (c) string (d) a mirror
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) a pencil (d) yeast
8. 8.True or false: a bottle opener is a lever. (a) False (b) True
9. 9.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) makes it magnetic (d) adds weight
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) a balloon (d) a pencil
11. 11.⚖️ 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
12. 12.True or false: a crane is a wheel and axle. (a) False (b) True
13. 13.⚙️ Which of these uses a pulley? (a) a slide (b) a ramp (c) a flagpole (d) a see-saw
14. 14.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a balloon (c) coins as the load (d) a mirror
16. 16.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (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? True or false: the same string is the one thing we change. (a) True (b) False
19. 19.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
20. 20.⚙️ Which simple machine is a crane? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
21. 21.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a steering wheel (c) a well pulley (d) a flagpole
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a pencil (c) a magnet (d) a mirror
23. 23.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
24. 24.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
25. 25.🧺 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) string (d) a battery cell
26. 26.True or false: a flagpole uses a pulley. (a) False (b) True
27. 27.⚖️ 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
28. 28.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the bench (d) on the flagpole
29. 29.True or false: string is needed for the thread-reel pulley. (a) True (b) False
30. 30.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
31. 31.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
32. 32.⚖️ 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
33. 33.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
34. 34.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
35. 35.⚖️ 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) how hard we must pull (d) the same string
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) string (d) turmeric powder
38. 38.🧺 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 small paper cup (d) a mirror
39. 39.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
40. 40.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed

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