Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 854 · 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 pencil is not needed for the thread-reel pulley. (a) True (b) False
2. 2.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a balloon (d) an empty thread reel
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 of these uses a pulley? (a) a see-saw (b) a well pulley (c) a tap handle (d) a spoon lifting a lid
6. 6.⚖️ 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
7. 7.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
8. 8.⚖️ 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) True (b) False
9. 9.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
10. 10.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) a balloon (d) turmeric powder
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a battery cell (d) a pencil
12. 12.True or false: a tap handle uses a pulley. (a) True (b) False
13. 13.True or false: a steering wheel is an inclined plane. (a) True (b) False
14. 14.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) the rope gets shorter (d) pulling down is easier
15. 15.⚖️ 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
16. 16.🛟 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
17. 17.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
18. 18.⚖️ 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) False (b) True
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
20. 20.⚖️ 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) the lifting height (c) how hard we must pull (d) number of pulleys
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
23. 23.🔮 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
24. 24.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
25. 25.⚖️ 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) True (b) False
26. 26.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) easier (d) the same
27. 27.True or false: a doorknob is a lever. (a) True (b) False
28. 28.⚖️ 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) False (b) True
29. 29.⚖️ 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
30. 30.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a pencil (d) a magnet
32. 32.True or false: a spoon lifting a lid is a lever. (a) False (b) True
33. 33.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
34. 34.⚖️ 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
35. 35.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
36. 36.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) a small paper cup (d) a magnet
38. 38.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) a balloon (d) a small paper cup
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False

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