Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 749 · 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.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) harder (d) easier
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a pencil (c) string (d) an empty thread reel
3. 3.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a flagpole (c) a crowbar (d) a doorknob
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a small paper cup (c) a pencil (d) coins as the load
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull (d) the lifting height
6. 6.🧺 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) string (d) a pencil
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) yeast (d) a balloon
8. 8.True or false: a ramp is an inclined plane. (a) True (b) False
9. 9.⚖️ 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) False (b) True
10. 10.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
11. 11.⚖️ 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
12. 12.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) water gets lighter (c) the rope gets shorter (d) the bucket floats
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a mirror (d) a pencil
14. 14.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) rope (d) battery
15. 15.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
16. 16.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
17. 17.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins (d) the lifting height
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a battery cell (c) an empty thread reel (d) a small paper cup
20. 20.⚙️ Which simple machine is a doorknob? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
21. 21.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
22. 22.True or false: a crowbar uses a pulley. (a) True (b) False
23. 23.True or false: a tap handle is a lever. (a) False (b) True
24. 24.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
25. 25.True or false: a slide is an inclined plane. (a) True (b) False
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) string (d) a mirror
27. 27.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
28. 28.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
29. 29.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
30. 30.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
31. 31.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
32. 32.⚖️ 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 same cup of coins (c) number of pulleys
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) a small paper cup (d) turmeric powder
36. 36.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it is magnetic (d) it could fall on you
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) how hard we must pull (c) number of pulleys
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) turmeric powder (d) a pencil
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) an empty thread reel (d) a balloon
40. 40.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a see-saw (c) a flagpole (d) a steering wheel

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