Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 569 · 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) sideways (b) down (c) up (d) in a circle
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a balloon (c) string (d) a pencil
3. 3.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) string (c) an empty thread reel (d) a small paper cup
5. 5.True or false: a crane is a lever. (a) False (b) True
6. 6.⚙️ Which simple machine is a well pulley? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) yeast (d) coins as the load
8. 8.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
9. 9.⚖️ 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
10. 10.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
11. 11.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
13. 13.⚙️ Which of these is a lever? (a) a bottle opener (b) a sloping road (c) a tap handle (d) a ramp
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the lifting height (c) how hard we must pull (d) the same cup of coins
15. 15.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) double (d) the same
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) a pencil (d) turmeric powder
17. 17.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
18. 18.True or false: a slide is a lever. (a) False (b) True
19. 19.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a flagpole (c) a sloping road (d) a crane
20. 20.⚖️ 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
21. 21.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) adds weight (d) halves the weight
22. 22.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
23. 23.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
24. 24.⚖️ 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 keep it the same (c) we change it
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) a pencil (c) coins as the load (d) string
26. 26.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
27. 27.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
29. 29.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
30. 30.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
31. 31.True or false: a ramp is a wheel and axle. (a) True (b) False
32. 32.⚖️ 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
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.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
35. 35.⚖️ 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) False (b) True
36. 36.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
37. 37.⚖️ 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
38. 38.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a magnet (c) an empty thread reel (d) a pencil

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