Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 780 · 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 can hurt your finger (c) it gets wet (d) it turns blue
3. 3.🧺 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) turmeric powder
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the same string (c) the same cup of coins (d) the lifting height
5. 5.True or false: a see-saw is a lever. (a) False (b) True
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the lifting height
7. 7.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a magnet (c) an empty thread reel (d) a pencil
9. 9.⚙️ Which of these is a lever? (a) a sloping road (b) a flagpole (c) a doorknob (d) a see-saw
10. 10.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 5 cm (d) 20 cm
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) string (d) a mirror
12. 12.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) a battery cell (d) yeast
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) turmeric powder (d) a pencil
15. 15.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) string (c) an empty thread reel (d) a pencil
17. 17.⚖️ 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
18. 18.⚖️ 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
19. 19.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
20. 20.⚖️ 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) how hard we must pull (c) the lifting height (d) the same cup of coins
21. 21.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
23. 23.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
24. 24.⚙️ Which simple machine is a well pulley? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a well pulley (c) a tap handle (d) a steering wheel
27. 27.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) the rope gets shorter (d) pulling down is easier
28. 28.⚖️ 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
29. 29.⚙️ Which simple machine is a crane? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) turmeric powder (c) a balloon (d) a battery cell
31. 31.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
32. 32.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) yeast (c) a small paper cup (d) string
34. 34.🛟 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
35. 35.True or false: string is needed for the thread-reel pulley. (a) True (b) False
36. 36.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) the same string (c) number of pulleys
38. 38.True or false: a crowbar is an inclined plane. (a) True (b) False
39. 39.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) string (c) a small paper cup (d) a pencil

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