Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 104 · 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 steering wheel is an inclined plane. (a) True (b) False
2. 2.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the rope gets shorter (c) the bucket floats (d) pulling down is easier
3. 3.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) yeast (d) turmeric powder
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) a magnet (d) a small paper cup
6. 6.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
7. 7.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
8. 8.⚖️ 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 keep it the same (b) we measure it (c) we change it
9. 9.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) rope (d) magnet
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the lifting height (c) number of pulleys (d) the same string
11. 11.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
12. 12.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a well pulley (c) a bottle opener (d) a tap handle
13. 13.⚖️ 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 change it (c) we keep it the same
14. 14.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
15. 15.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
16. 16.True or false: a tap handle uses a pulley. (a) False (b) True
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a battery cell (d) coins as the load
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a battery cell (c) a balloon (d) a mirror
19. 19.True or false: a see-saw is an inclined plane. (a) True (b) False
20. 20.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a steering wheel (c) a slide (d) a see-saw
21. 21.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same cup of coins (c) number of pulleys (d) how hard we must pull
23. 23.⚖️ 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 same string
24. 24.⚖️ 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) the lifting height (c) how hard we must pull
25. 25.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
26. 26.⚖️ 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
27. 27.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we keep it the same (c) we change it
29. 29.🧺 Do we need a pencil 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 lifting height is kept the same. (a) False (b) True
31. 31.⚙️ Which of these uses a pulley? (a) a flagpole (b) a tap handle (c) a sloping road (d) a doorknob
32. 32.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a bottle opener (c) a ramp (d) a steering wheel
33. 33.⚖️ 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) False (b) True
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a balloon (c) a magnet (d) a small paper cup
35. 35.True or false: a doorknob is a wheel and axle. (a) False (b) True
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) string (b) a pencil (c) a balloon (d) a small paper cup
38. 38.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
39. 39.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it could fall on you (d) it is magnetic
40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) an empty thread reel (d) a small paper cup

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