Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 91 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) turmeric powder (d) a pencil
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) an empty thread reel (c) a mirror (d) a magnet
3. 3.⚙️ Which of these is an inclined plane? (a) a ramp (b) a doorknob (c) a crane (d) a crowbar
4. 4.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) nail (d) battery
5. 5.⚖️ 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
6. 6.True or false: a sloping road is an inclined plane. (a) False (b) True
7. 7.True or false: a slide is a lever. (a) True (b) False
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) coins as the load (c) an empty thread reel (d) a small paper cup
9. 9.⚙️ Which of these uses a pulley? (a) a flagpole (b) a sloping road (c) a doorknob (d) a crowbar
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same string (c) how hard we must pull (d) number of pulleys
11. 11.⚖️ 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) number of pulleys
12. 12.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
13. 13.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a magnet (d) a small paper cup
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) an empty thread reel (d) a mirror
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a pencil (c) coins as the load (d) string
17. 17.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
18. 18.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a pencil (c) a mirror (d) a magnet
20. 20.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) changes pull direction (d) adds weight
21. 21.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
22. 22.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) False (b) True
24. 24.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
25. 25.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
26. 26.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) a mirror (d) a small paper cup
28. 28.⚙️ Which of these is a lever? (a) a doorknob (b) a steering wheel (c) a sloping road (d) a bottle opener
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we keep it the same (c) we change it
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) yeast (d) string
31. 31.⚖️ 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) how hard we must pull (c) the lifting height
32. 32.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
33. 33.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
34. 34.True or false: a mirror 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: number of pulleys is kept the same. (a) False (b) True
36. 36.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 5 cm (d) 40 cm
37. 37.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
38. 38.⚙️ Which of these is a lever? (a) a see-saw (b) a tap handle (c) a flagpole (d) a sloping road
39. 39.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a slide (c) a steering wheel (d) a crowbar
40. 40.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a bottle opener (c) a spoon lifting a lid (d) a sloping road

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