Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 345 · 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 mirror is needed for the thread-reel pulley. (a) False (b) True
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a battery cell (c) a mirror (d) a magnet
4. 4.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) the bucket floats (d) pulling down is easier
5. 5.True or false: a crowbar uses a pulley. (a) True (b) False
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
7. 7.⚖️ 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
8. 8.⚙️ Which simple machine is a flagpole? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
9. 9.⚙️ Which of these uses a pulley? (a) a tap handle (b) a crane (c) a bottle opener (d) a slide
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) coins as the load (c) a pencil (d) a small paper cup
11. 11.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) turmeric powder (c) an empty thread reel (d) string
13. 13.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
14. 14.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a crowbar (c) a bottle opener (d) a tap handle
15. 15.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) changes pull direction (d) adds weight
16. 16.True or false: a well pulley uses a pulley. (a) True (b) False
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) a small paper cup (d) an empty thread reel
18. 18.⚖️ 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 cup of coins (c) number of pulleys
19. 19.True or false: string is needed for the thread-reel pulley. (a) True (b) False
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) turmeric powder (c) a pencil (d) an empty thread reel
21. 21.⚖️ 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
22. 22.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a mirror (c) an empty thread reel (d) a small paper cup
24. 24.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
25. 25.⚙️ Which of these uses a pulley? (a) a tap handle (b) a crowbar (c) a spoon lifting a lid (d) a well pulley
26. 26.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
27. 27.True or false: a crowbar is a lever. (a) True (b) False
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the same cup of coins (c) the same string (d) number of pulleys
29. 29.⚖️ 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
30. 30.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
31. 31.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) a magnet (d) a battery cell
33. 33.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
34. 34.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
35. 35.True or false: a flagpole is an inclined plane. (a) False (b) True
36. 36.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 10 cm (d) 40 cm
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) string (c) a small paper cup (d) an empty thread reel
38. 38.⚙️ Which of these is a lever? (a) a steering wheel (b) a crowbar (c) a doorknob (d) a crane
39. 39.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
40. 40.True or false: a steering wheel is a lever. (a) True (b) False

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