Pulley STEM Project Worksheet

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

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