Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 183 · 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.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
2. 2.⚖️ 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
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) an empty thread reel (d) a battery cell
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) the lifting height (c) how hard we must pull (d) number of pulleys
5. 5.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
6. 6.True or false: a ramp is a lever. (a) True (b) False
7. 7.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) coins as the load (d) a magnet
9. 9.True or false: a doorknob is a wheel and axle. (a) True (b) False
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) the lifting height (b) the same string (c) the same cup of coins (d) number of pulleys
11. 11.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) halves the weight (c) adds weight (d) changes pull direction
12. 12.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
13. 13.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
14. 14.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it is magnetic (d) it might sing
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 keep it the same (b) we change it (c) we measure it
16. 16.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) number of pulleys (c) how hard we must pull
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) turmeric powder (d) string
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a mirror (c) a magnet (d) coins as the load
20. 20.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) a balloon (d) string
22. 22.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
23. 23.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the flagpole (c) in the tap (d) on the blackboard
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) an empty thread reel (d) a mirror
25. 25.True or false: a well pulley uses a pulley. (a) True (b) False
26. 26.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) how hard we must pull (c) number of pulleys
28. 28.⚖️ 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
29. 29.⚙️ Which of these is an inclined plane? (a) a slide (b) a spoon lifting a lid (c) a see-saw (d) a well pulley
30. 30.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
31. 31.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) easier (d) impossible
32. 32.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
33. 33.⚖️ 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
34. 34.⚙️ Which simple machine is a tap handle? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
35. 35.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) zero (d) double
36. 36.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
37. 37.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
38. 38.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
39. 39.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
40. 40.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True

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