Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 814 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a small paper cup (d) turmeric powder
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) number of pulleys (c) how hard we must pull (d) the same string
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a battery cell (c) a magnet (d) coins as the load
5. 5.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the flagpole (d) on the bench
6. 6.⚖️ 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 measure it (c) we keep it the same
7. 7.⚖️ 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
8. 8.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
10. 10.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
11. 11.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
12. 12.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
13. 13.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) string (d) a small paper cup
15. 15.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
16. 16.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a slide (c) a sloping road (d) a steering wheel
17. 17.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
18. 18.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
19. 19.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a mirror (c) a pencil (d) coins as the load
21. 21.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
22. 22.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets longer (d) it gets wet
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) a pencil (d) a balloon
24. 24.⚖️ 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) False (b) True
25. 25.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) makes it magnetic (d) adds weight
26. 26.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) sideways (d) up
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) a battery cell (d) a magnet
28. 28.⚙️ Which of these is an inclined plane? (a) a ramp (b) a doorknob (c) a bottle opener (d) a well pulley
29. 29.True or false: a steering wheel is a wheel and axle. (a) True (b) False
30. 30.True or false: a well pulley uses a pulley. (a) True (b) False
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a balloon (d) coins as the load
32. 32.⚖️ 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) True (b) False
33. 33.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) water gets lighter (d) pulling down is easier
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) a small paper cup (d) yeast
35. 35.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 10 cm (d) 40 cm
36. 36.⚙️ Which simple machine is a sloping road? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
37. 37.True or false: a slide is an inclined plane. (a) True (b) False
38. 38.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
39. 39.True or false: a ramp is a wheel and axle. (a) False (b) True
40. 40.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False

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