Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 93 · 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? True or false: the same string is kept the same. (a) False (b) True
2. 2.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) a small paper cup (d) turmeric powder
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a balloon (d) yeast
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) the lifting height (c) the same cup of coins (d) how hard we must pull
6. 6.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) up (d) down
7. 7.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
8. 8.⚖️ 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
9. 9.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
10. 10.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) about half (d) the same
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) coins as the load (d) a balloon
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) string (d) turmeric powder
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a small paper cup (c) a mirror (d) a balloon
14. 14.⚖️ 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 lifting height (c) number of pulleys (d) the same string
15. 15.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
16. 16.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
17. 17.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a battery cell (c) a pencil (d) coins as the load
19. 19.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
20. 20.⚖️ 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) False (b) True
21. 21.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a sloping road (c) a flagpole (d) a see-saw
22. 22.True or false: a crane is a lever. (a) False (b) True
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
24. 24.⚖️ 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 string (c) how hard we must pull
25. 25.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
26. 26.True or false: a doorknob is a wheel and axle. (a) False (b) True
27. 27.⚙️ Which of these is a lever? (a) a tap handle (b) a doorknob (c) a flagpole (d) a bottle opener
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a magnet (c) a small paper cup (d) a pencil
29. 29.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
30. 30.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
31. 31.⚖️ 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
32. 32.⚙️ Which of these is a lever? (a) a slide (b) a flagpole (c) a sloping road (d) a spoon lifting a lid
33. 33.⚖️ 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
34. 34.True or false: a well pulley is a wheel and axle. (a) True (b) False
35. 35.⚖️ 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
36. 36.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a spoon lifting a lid (c) a see-saw (d) a slide
37. 37.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
38. 38.True or false: a slide is an inclined plane. (a) True (b) False
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) string (d) a mirror
40. 40.True or false: a crowbar is a lever. (a) False (b) True

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