Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 829 · 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.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
2. 2.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
3. 3.⚖️ 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
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) yeast (c) string (d) coins as the load
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a small paper cup (c) a balloon (d) turmeric powder
6. 6.⚙️ Which of these is a lever? (a) a crowbar (b) a sloping road (c) a doorknob (d) a tap handle
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) coins as the load (c) an empty thread reel (d) turmeric powder
8. 8.⚖️ 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
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) turmeric powder (d) an empty thread reel
10. 10.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
11. 11.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
13. 13.True or false: a doorknob is a wheel and axle. (a) True (b) False
14. 14.True or false: a see-saw is a wheel and axle. (a) False (b) True
15. 15.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) in the tap (c) on the bench (d) on the blackboard
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) coins as the load (c) a balloon (d) a mirror
17. 17.⚙️ Which of these uses a pulley? (a) a well pulley (b) a tap handle (c) a crowbar (d) a ramp
18. 18.⚖️ 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 change it (b) we measure it (c) we keep it the same
19. 19.True or false: a crowbar is a lever. (a) True (b) False
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) a magnet (d) a pencil
21. 21.⚙️ Which of these is an inclined plane? (a) a ramp (b) a well pulley (c) a spoon lifting a lid (d) a bottle opener
22. 22.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 20 cm (d) 5 cm
23. 23.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a balloon (d) a small paper cup
25. 25.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) in a circle (d) sideways
26. 26.⚖️ 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
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a battery cell (c) string (d) coins as the load
28. 28.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight
29. 29.⚖️ 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) the same cup of coins (d) how hard we must pull
30. 30.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
31. 31.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the bucket floats (d) the rope gets shorter
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
33. 33.True or false: string is needed for the thread-reel pulley. (a) False (b) True
34. 34.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) turmeric powder (c) a battery cell (d) yeast
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
37. 37.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
38. 38.True or false: a crane uses a pulley. (a) True (b) False
39. 39.⚖️ 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) True (b) False
40. 40.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a slide (c) a tap handle (d) a bottle opener

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