Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 646 · 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 ramp is a lever. (a) True (b) False
2. 2.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
3. 3.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
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) False (b) True
5. 5.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) magnet (d) rope
6. 6.⚖️ 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 change it (c) we keep it the same
7. 7.True or false: a flagpole is a wheel and axle. (a) False (b) True
8. 8.⚖️ 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
9. 9.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a tap handle (c) a steering wheel (d) a ramp
10. 10.🛟 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
11. 11.⚖️ 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
12. 12.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer
13. 13.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) turmeric powder (c) a battery cell (d) yeast
15. 15.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
16. 16.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 10 cm (d) 5 cm
17. 17.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
18. 18.True or false: a sloping road is an inclined plane. (a) False (b) True
19. 19.⚙️ Which simple machine is a crowbar? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
20. 20.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) the same (d) zero
21. 21.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) easier (d) impossible
22. 22.True or false: a flagpole is a lever. (a) False (b) True
23. 23.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a pencil (d) a balloon
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a battery cell (d) yeast
26. 26.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a balloon (d) coins as the load
28. 28.⚖️ 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
29. 29.⚖️ 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) number of pulleys (c) the lifting height (d) the same string
30. 30.⚙️ Which of these uses a pulley? (a) a ramp (b) a steering wheel (c) a see-saw (d) a crane
31. 31.⚖️ 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) how hard we must pull (c) number of pulleys (d) the lifting height
32. 32.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
33. 33.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
34. 34.True or false: a bottle opener is an inclined plane. (a) True (b) False
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys
36. 36.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a crowbar (c) a flagpole (d) a sloping road
37. 37.⚖️ 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 keep it the same (c) we measure it
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
39. 39.⚖️ 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) True (b) False
40. 40.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False

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