Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 545 · 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.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) sideways (d) in a circle
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) the same (d) about half
3. 3.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
4. 4.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 40 cm (d) 20 cm
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) turmeric powder (c) string (d) a pencil
6. 6.True or false: string is needed for the thread-reel pulley. (a) True (b) False
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull (d) the same string
8. 8.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it can hurt your finger (d) it gets longer
9. 9.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
10. 10.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
11. 11.⚖️ 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 measure it (b) we keep it the same (c) we change it
12. 12.⚖️ 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
13. 13.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
14. 14.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) a magnet (d) string
16. 16.True or false: a steering wheel is an inclined plane. (a) True (b) False
17. 17.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the rope gets shorter (c) pulling down is easier (d) the bucket floats
18. 18.True or false: a bottle opener is a wheel and axle. (a) True (b) False
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a battery cell (c) a small paper cup (d) a pencil
20. 20.⚖️ 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
21. 21.🧺 Do we need a pencil 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? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a pencil (d) yeast
24. 24.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) turmeric powder (d) an empty thread reel
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) an empty thread reel (d) a battery cell
27. 27.⚙️ Which of these uses a pulley? (a) a crowbar (b) a steering wheel (c) a ramp (d) a flagpole
28. 28.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
29. 29.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) string (c) an empty thread reel (d) a small paper cup
30. 30.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) turmeric powder (c) a balloon (d) a battery cell
32. 32.⚙️ Which of these is a lever? (a) a well pulley (b) a see-saw (c) a steering wheel (d) a crane
33. 33.⚖️ 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 cup of coins
34. 34.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
35. 35.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
36. 36.True or false: a well pulley uses a pulley. (a) False (b) True
37. 37.True or false: a doorknob is a wheel and axle. (a) True (b) False
38. 38.⚖️ 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 change it (c) we keep it the same
39. 39.True or false: a steering wheel is a wheel and axle. (a) False (b) True
40. 40.True or false: a tap handle is a wheel and axle. (a) True (b) False

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