Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 66 · 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 a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
2. 2.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 40 cm (d) 10 cm
3. 3.True or false: string is needed for the thread-reel pulley. (a) False (b) True
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same cup of coins”? (a) we measure it (b) we change it (c) we keep it the same
5. 5.True or false: a steering wheel is a wheel and axle. (a) False (b) True
6. 6.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
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 simple machine is a steering wheel? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
9. 9.🛟 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
10. 10.⚙️ Which simple machine is a crane? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) coins as the load (d) a magnet
12. 12.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a sloping road (c) a steering wheel (d) a flagpole
13. 13.True or false: a spoon lifting a lid is a lever. (a) False (b) True
14. 14.⚙️ Which of these is a lever? (a) a flagpole (b) a doorknob (c) a spoon lifting a lid (d) a sloping road
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a mirror (c) a small paper cup (d) string
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) coins as the load (d) a magnet
17. 17.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
18. 18.⚖️ 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 keep it the same (c) we measure it
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) a small paper cup (c) a pencil (d) coins as the load
20. 20.⚖️ 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
21. 21.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
22. 22.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
23. 23.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) down (d) in a circle
24. 24.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
25. 25.True or false: a steering wheel is a lever. (a) True (b) False
26. 26.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
27. 27.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) halves the weight (d) makes it magnetic
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) coins as the load (d) turmeric powder
29. 29.True or false: a crowbar is a lever. (a) True (b) False
30. 30.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
31. 31.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) string (c) coins as the load (d) a pencil
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) True (b) False
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we change it (b) we measure it (c) we keep it the same
35. 35.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
36. 36.⚖️ 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 same cup of coins
37. 37.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
38. 38.⚙️ Which of these is a lever? (a) a steering wheel (b) a see-saw (c) a crane (d) a slide
39. 39.🧺 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
40. 40.True or false: a ramp is a lever. (a) False (b) True

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