Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 397 · 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 flagpole? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
2. 2.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 10 cm (d) 40 cm
3. 3.⚖️ 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) True (b) False
4. 4.🧺 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 battery cell (d) a small paper cup
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) yeast (d) a small paper cup
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a magnet (d) a pencil
7. 7.⚖️ 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 cup of coins
8. 8.⚖️ 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
9. 9.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) the same (d) harder
10. 10.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
11. 11.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
12. 12.True or false: a bottle opener is a lever. (a) False (b) True
13. 13.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) in a circle (c) up (d) sideways
14. 14.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a well pulley (c) a ramp (d) a steering wheel
15. 15.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
17. 17.⚖️ 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
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a mirror (c) coins as the load (d) string
19. 19.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
20. 20.⚖️ 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
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) a balloon (d) a pencil
22. 22.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
23. 23.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) magnet (d) rope
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a balloon (c) a small paper cup (d) an empty thread reel
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a battery cell (c) turmeric powder (d) a balloon
26. 26.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
27. 27.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) a mirror (d) an empty thread reel
29. 29.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
30. 30.True or false: a ramp is an inclined plane. (a) False (b) True
31. 31.True or false: string is needed for the thread-reel pulley. (a) False (b) True
32. 32.🛟 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
33. 33.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
34. 34.True or false: a flagpole is a lever. (a) False (b) True
35. 35.⚖️ 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) the lifting height (c) number of pulleys
36. 36.⚖️ 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 measure it (c) we change it
37. 37.⚙️ Which of these uses a pulley? (a) a well pulley (b) a sloping road (c) a steering wheel (d) a crowbar
38. 38.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
39. 39.⚙️ Which simple machine is a slide? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
40. 40.⚖️ 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 measure it (b) we keep it the same (c) we change it

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