Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 961 · 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.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
2. 2.True or false: a crowbar is a lever. (a) True (b) False
3. 3.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it gets wet (d) it turns blue
4. 4.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
5. 5.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) a small paper cup (c) string (d) a pencil
6. 6.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 5 cm (d) 40 cm
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) True (b) False
8. 8.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) harder (d) easier
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a mirror (c) a small paper cup (d) an empty thread reel
10. 10.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) turmeric powder (d) string
12. 12.⚖️ 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) False (b) True
13. 13.⚖️ 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
14. 14.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
15. 15.⚖️ 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
16. 16.True or false: a well pulley is an inclined plane. (a) True (b) False
17. 17.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
18. 18.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it gets hot (d) it is magnetic
19. 19.⚙️ Which of these is an inclined plane? (a) a slide (b) a well pulley (c) a flagpole (d) a see-saw
20. 20.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
21. 21.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) yeast (c) a pencil (d) coins as the load
23. 23.⚙️ Which of these is a lever? (a) a crowbar (b) a well pulley (c) a doorknob (d) a sloping road
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) how hard we must pull (c) number of pulleys
25. 25.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
26. 26.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a ramp (c) a crowbar (d) a flagpole
27. 27.⚖️ 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
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) the same cup of coins (c) how hard we must pull
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a small paper cup (c) turmeric powder (d) a mirror
30. 30.True or false: string is needed for the thread-reel pulley. (a) True (b) False
31. 31.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
32. 32.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a magnet (c) an empty thread reel (d) string
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) number of pulleys (c) how hard we must pull
35. 35.⚖️ 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) the same string
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we change it (c) we measure it
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a balloon (c) a small paper cup (d) string
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) coins as the load (d) yeast
40. 40.True or false: a bottle opener is a lever. (a) True (b) False

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