Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 575 · 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 turmeric powder for the thread-reel pulley? (a) needed (b) not needed
2. 2.🛟 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
3. 3.⚖️ 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 same string (c) how hard we must pull (d) number of pulleys
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) string (d) a magnet
5. 5.⚙️ Which of these is a wheel and axle? (a) a slide (b) a see-saw (c) a steering wheel (d) a spoon lifting a lid
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a pencil (c) coins as the load (d) a small paper cup
7. 7.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
8. 8.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
9. 9.⚖️ 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 measure it (c) we keep it the same
10. 10.True or false: a sloping road is a wheel and axle. (a) True (b) False
11. 11.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
12. 12.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) a balloon (d) a small paper cup
14. 14.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
15. 15.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) on the bench (d) in the tap
16. 16.⚖️ 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
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a mirror (c) turmeric powder (d) a balloon
18. 18.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
19. 19.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) in a circle (c) sideways (d) up
20. 20.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
21. 21.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) the same (d) about half
22. 22.True or false: a see-saw uses a pulley. (a) True (b) False
23. 23.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
24. 24.⚖️ 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
25. 25.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
26. 26.⚖️ 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
27. 27.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same
29. 29.⚖️ 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
30. 30.🧺 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) a pencil
31. 31.⚙️ Which of these uses a pulley? (a) a crane (b) a doorknob (c) a sloping road (d) a bottle opener
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a battery cell (d) turmeric powder
33. 33.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) string (d) a battery cell
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
36. 36.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) a pencil (d) coins as the load
38. 38.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a slide (c) a see-saw (d) a spoon lifting a lid
39. 39.⚙️ Which simple machine is a well pulley? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
40. 40.True or false: a ramp is an inclined plane. (a) False (b) True

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