Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 530 · 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.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) coins as the load (d) turmeric powder
2. 2.⚖️ 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
3. 3.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
4. 4.⚖️ 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
5. 5.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) a mirror (d) string
7. 7.🛟 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
8. 8.⚙️ Which simple machine is a ramp? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
9. 9.⚖️ 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
10. 10.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) the rope gets shorter (d) pulling down is easier
11. 11.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a tap handle (c) a bottle opener (d) a sloping road
12. 12.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) turmeric powder (d) a battery cell
14. 14.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a mirror (c) a balloon (d) turmeric powder
16. 16.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a flagpole (c) a crowbar (d) a sloping road
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a balloon (c) a small paper cup (d) coins as the load
18. 18.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we keep it the same (c) we change it
20. 20.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a small paper cup (d) a mirror
22. 22.⚖️ 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
23. 23.True or false: a see-saw is a wheel and axle. (a) True (b) False
24. 24.⚖️ 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 keep it the same (c) we measure it
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) string (d) a balloon
26. 26.⚙️ Which of these is a lever? (a) a crowbar (b) a ramp (c) a flagpole (d) a steering wheel
27. 27.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) how hard we must pull (c) number of pulleys
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True
30. 30.True or false: a crane uses a pulley. (a) True (b) False
31. 31.⚖️ 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) True (b) False
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) a pencil (d) an empty thread reel
33. 33.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the flagpole (c) on the bench (d) on the blackboard
34. 34.⚖️ 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) the same string (c) number of pulleys (d) how hard we must pull
35. 35.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
36. 36.True or false: a doorknob is a lever. (a) True (b) False
37. 37.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 40 cm (d) 10 cm
38. 38.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a doorknob (c) a crane (d) a spoon lifting a lid
39. 39.⚖️ 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
40. 40.True or false: a flagpole uses a pulley. (a) False (b) True

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