Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 735 · 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? True or false: how hard we must pull is what we measure. (a) True (b) False
2. 2.True or false: a see-saw is a lever. (a) False (b) True
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a small paper cup (c) a balloon (d) a battery cell
4. 4.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
5. 5.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a battery cell (d) an empty thread reel
6. 6.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
7. 7.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
8. 8.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
9. 9.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
10. 10.True or false: a flagpole uses a pulley. (a) True (b) False
11. 11.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
12. 12.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the flagpole (d) on the blackboard
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a balloon (c) turmeric powder (d) string
14. 14.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
15. 15.True or false: a well pulley is an inclined plane. (a) False (b) True
16. 16.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 5 cm (d) 40 cm
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) a small paper cup (d) a balloon
18. 18.⚖️ 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 lifting height
19. 19.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
21. 21.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) turmeric powder (d) string
23. 23.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
24. 24.⚖️ 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 change it (c) we measure it
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) coins as the load (d) a magnet
26. 26.⚖️ 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 change it (b) we measure it (c) we keep it the same
27. 27.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
28. 28.⚖️ 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) True (b) False
29. 29.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) halves the weight (d) adds weight
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) coins as the load (d) turmeric powder
31. 31.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
32. 32.🛟 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
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
34. 34.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it gets wet (d) it can hurt your finger
35. 35.⚖️ 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) the lifting height (c) number of pulleys (d) how hard we must pull
36. 36.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) an empty thread reel (d) yeast
38. 38.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
39. 39.True or false: a ramp is an inclined plane. (a) True (b) False
40. 40.⚙️ Which of these is an inclined plane? (a) a ramp (b) a well pulley (c) a tap handle (d) a flagpole

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