Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 185 · 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.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
2. 2.True or false: a well pulley is a wheel and axle. (a) False (b) True
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a small paper cup (d) a balloon
4. 4.⚖️ 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) number of pulleys (c) the same cup of coins
5. 5.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the rope gets shorter (c) pulling down is easier (d) the bucket floats
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a balloon (c) a pencil (d) an empty thread reel
7. 7.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) an empty thread reel (d) yeast
9. 9.⚖️ 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
10. 10.True or false: a see-saw is an inclined plane. (a) False (b) True
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) a mirror (d) coins as the load
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) yeast (d) a pencil
13. 13.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
14. 14.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
15. 15.⚖️ 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 measure it (b) we change it (c) we keep it the same
16. 16.⚙️ Which simple machine is a see-saw? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
17. 17.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it can hurt your finger (d) it turns blue
18. 18.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 5 cm (d) 20 cm
19. 19.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) battery (c) nail (d) magnet
20. 20.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it gets hot (d) it might sing
21. 21.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) on the flagpole (d) in the tap
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) yeast (d) an empty thread reel
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) a small paper cup (d) a mirror
24. 24.🧺 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) a small paper cup
25. 25.⚖️ 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 lifting height (c) number of pulleys
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) False (b) True
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) string (c) a pencil (d) an empty thread reel
28. 28.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same string (c) the same cup of coins (d) number of pulleys
30. 30.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
31. 31.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
32. 32.True or false: a doorknob is an inclined plane. (a) False (b) True
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) False (b) True
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) an empty thread reel (c) a small paper cup (d) coins as the load
35. 35.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) makes it magnetic (c) adds weight (d) halves the weight
36. 36.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
37. 37.True or false: a steering wheel is a wheel and axle. (a) True (b) False
38. 38.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) an empty thread reel (d) a mirror
40. 40.⚖️ 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

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