Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 357 · 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.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it gets wet (d) it turns blue
2. 2.⚙️ Which of these is a lever? (a) a bottle opener (b) a flagpole (c) a sloping road (d) a crane
3. 3.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
4. 4.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
5. 5.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) string (c) a magnet (d) yeast
7. 7.⚖️ 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
8. 8.🏗️ 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
9. 9.⚖️ 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
10. 10.⚖️ 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
11. 11.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it gets hot (d) it is magnetic
12. 12.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
13. 13.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
14. 14.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
15. 15.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) string (d) turmeric powder
18. 18.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
20. 20.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 40 cm (d) 5 cm
21. 21.True or false: a tap handle is a lever. (a) False (b) True
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
23. 23.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
24. 24.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
25. 25.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) a magnet (d) yeast
27. 27.⚖️ 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
28. 28.True or false: a steering wheel is a wheel and axle. (a) False (b) True
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) coins as the load (c) yeast (d) a mirror
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) False (b) True
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) the same cup of coins (c) number of pulleys (d) how hard we must pull
32. 32.⚖️ 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 measure it (c) we keep it the same
33. 33.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
34. 34.⚙️ Which of these uses a pulley? (a) a well pulley (b) a bottle opener (c) a crowbar (d) a spoon lifting a lid
35. 35.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
36. 36.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
37. 37.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
38. 38.True or false: a spoon lifting a lid is a lever. (a) True (b) False
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
40. 40.⚖️ 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

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