Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 418 · 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.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
2. 2.True or false: a see-saw uses a pulley. (a) False (b) True
3. 3.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
4. 4.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
5. 5.⚙️ Which of these is a lever? (a) a see-saw (b) a crane (c) a tap handle (d) a slide
6. 6.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer
7. 7.⚖️ 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 measure it (b) we keep it the same (c) we change it
8. 8.⚙️ Which of these uses a pulley? (a) a sloping road (b) a slide (c) a well pulley (d) a crowbar
9. 9.⚙️ Which of these uses a pulley? (a) a sloping road (b) a crane (c) a bottle opener (d) a see-saw
10. 10.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
11. 11.True or false: a well pulley is a lever. (a) False (b) True
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) a pencil (d) a battery cell
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) an empty thread reel (c) string (d) a pencil
16. 16.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) harder (d) the same
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we keep it the same (c) we change it
18. 18.⚖️ 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 keep it the same (c) we measure it
19. 19.True or false: a crane uses a pulley. (a) True (b) False
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) True (b) False
21. 21.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
22. 22.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
23. 23.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) in the tap (d) on the flagpole
24. 24.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a battery cell (c) a pencil (d) string
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a small paper cup (c) a balloon (d) a battery cell
27. 27.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a see-saw (c) a spoon lifting a lid (d) a doorknob
28. 28.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
29. 29.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) the lifting height (d) number of pulleys
32. 32.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
33. 33.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
34. 34.True or false: a ramp is a wheel and axle. (a) False (b) True
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) a mirror (d) coins as the load
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) an empty thread reel (c) string (d) a small paper cup
37. 37.⚖️ 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
38. 38.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 10 cm (d) 40 cm
39. 39.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True

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