Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 734 · 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) harder (b) easier (c) the same (d) impossible
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) a pencil (c) a small paper cup (d) an empty thread reel
3. 3.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
4. 4.🔮 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
5. 5.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a steering wheel (c) a bottle opener (d) a ramp
6. 6.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
7. 7.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) the rope gets shorter (d) pulling down is easier
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) string (c) a mirror (d) a battery cell
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) coins as the load (d) a battery cell
10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a pencil (d) a battery cell
11. 11.True or false: a see-saw is an inclined plane. (a) False (b) True
12. 12.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
14. 14.🛟 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
15. 15.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
16. 16.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
17. 17.True or false: a flagpole is a lever. (a) True (b) False
18. 18.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) how hard we must pull (c) the same string (d) the lifting height
20. 20.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
21. 21.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a balloon (c) string (d) a small paper cup
23. 23.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
24. 24.True or false: a sloping road is a lever. (a) False (b) True
25. 25.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) rope (d) magnet
26. 26.⚖️ 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
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) a mirror (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 string”? (a) we change it (b) we measure it (c) we keep it the same
29. 29.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a spoon lifting a lid (c) a steering wheel (d) a crane
30. 30.True or false: a battery cell 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? Which of these is what we measure? (a) the same cup of coins (b) how hard we must pull (c) the same string (d) number of pulleys
32. 32.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
33. 33.True or false: a crowbar is a lever. (a) False (b) True
34. 34.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
35. 35.True or false: a well pulley uses a pulley. (a) True (b) False
36. 36.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) string (c) an empty thread reel (d) a pencil
38. 38.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
39. 39.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
40. 40.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a ramp (c) a tap handle (d) a well pulley

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