Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 777 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a mirror (c) an empty thread reel (d) a pencil
2. 2.⚙️ Which of these uses a pulley? (a) a doorknob (b) a spoon lifting a lid (c) a flagpole (d) a sloping road
3. 3.⚖️ 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 keep it the same (c) we change it
4. 4.⚖️ 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 change it (b) we measure it (c) we keep it the same
5. 5.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull (d) the same string
7. 7.⚖️ 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
8. 8.True or false: a see-saw uses a pulley. (a) False (b) True
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) a pencil (d) yeast
10. 10.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
11. 11.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
12. 12.⚙️ Which of these uses a pulley? (a) a sloping road (b) a see-saw (c) a spoon lifting a lid (d) a crane
13. 13.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) string (c) coins as the load (d) an empty thread reel
15. 15.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it is magnetic (d) it gets hot
16. 16.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
17. 17.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
18. 18.True or false: a crane uses a pulley. (a) True (b) False
19. 19.⚖️ 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 change it (c) we measure it
20. 20.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
21. 21.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) easier (d) impossible
22. 22.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) pulling down is easier (d) water gets lighter
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
24. 24.⚙️ Which simple machine is a slide? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
25. 25.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
26. 26.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
27. 27.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) down (d) sideways
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 keep it the same (b) we change it (c) we measure it
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) yeast (d) a magnet
30. 30.True or false: a sloping road is a wheel and axle. (a) True (b) False
31. 31.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
32. 32.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
33. 33.⚖️ 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) number of pulleys (c) the lifting height (d) the same cup of coins
34. 34.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) halves the weight (d) makes it magnetic
35. 35.⚖️ 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) False (b) True
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) a magnet (d) a pencil
37. 37.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a balloon (c) an empty thread reel (d) a pencil
39. 39.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
40. 40.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed

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