Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 872 · 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.⚖️ 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
2. 2.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
3. 3.⚖️ 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
4. 4.⚖️ 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) True (b) False
5. 5.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
6. 6.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) a mirror (d) string
8. 8.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
9. 9.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
10. 10.True or false: a slide is an inclined plane. (a) False (b) True
11. 11.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it gets hot (d) it is magnetic
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) string (d) coins as the load
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) an empty thread reel (d) yeast
14. 14.⚖️ 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
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a small paper cup (d) a mirror
16. 16.⚖️ 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
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? What do we do with “number of pulleys”? (a) we change it (b) we keep it the same (c) we measure it
19. 19.⚙️ Which of these is a lever? (a) a doorknob (b) a steering wheel (c) a spoon lifting a lid (d) a flagpole
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a pencil (c) string (d) an empty thread reel
21. 21.⚙️ Which of these is a lever? (a) a doorknob (b) a steering wheel (c) a crane (d) a crowbar
22. 22.⚙️ Which of these is a lever? (a) a doorknob (b) a ramp (c) a crane (d) a see-saw
23. 23.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
24. 24.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
25. 25.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
26. 26.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
27. 27.⚖️ 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
28. 28.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
29. 29.⚖️ 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
30. 30.⚖️ 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 keep it the same (b) we change it (c) we measure it
31. 31.🔮 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
32. 32.⚙️ Which of these is a lever? (a) a flagpole (b) a doorknob (c) a bottle opener (d) a ramp
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) a pencil (d) a balloon
34. 34.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) the same (d) zero
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a pencil (c) a magnet (d) yeast
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the same cup of coins (c) the lifting height (d) number of pulleys
37. 37.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
38. 38.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
40. 40.True or false: a crane uses a pulley. (a) True (b) False

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