Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 339 · 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.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
2. 2.True or false: a steering wheel is a wheel and axle. (a) True (b) False
3. 3.True or false: a magnet is not 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.🇮🇳 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
6. 6.⚙️ Which of these is a wheel and axle? (a) a slide (b) a bottle opener (c) a tap handle (d) a spoon lifting a lid
7. 7.⚖️ 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
8. 8.⚙️ Which of these uses a pulley? (a) a crane (b) a crowbar (c) a doorknob (d) a spoon lifting a lid
9. 9.⚖️ 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
10. 10.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
11. 11.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
12. 12.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
13. 13.⚖️ 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) how hard we must pull (d) the lifting height
14. 14.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) rope (d) nail
15. 15.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it gets wet (d) it can hurt your finger
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) a pencil (d) a balloon
17. 17.⚖️ 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
18. 18.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
19. 19.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 5 cm (d) 40 cm
20. 20.🧺 Do we need turmeric powder 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) string (b) a battery cell (c) coins as the load (d) an empty thread reel
22. 22.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
23. 23.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) coins as the load (d) a magnet
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) an empty thread reel (d) turmeric powder
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a balloon (d) a small paper cup
27. 27.⚙️ Which of these is a lever? (a) a ramp (b) a crowbar (c) a steering wheel (d) a flagpole
28. 28.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
29. 29.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
30. 30.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
31. 31.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) turmeric powder (d) a pencil
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) a magnet (d) a battery cell
34. 34.⚙️ Which of these uses a pulley? (a) a tap handle (b) a sloping road (c) a flagpole (d) a bottle opener
35. 35.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) changes pull direction (d) makes it magnetic
36. 36.🏗️ 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
37. 37.True or false: a flagpole is a lever. (a) True (b) False
38. 38.True or false: string is needed for the thread-reel pulley. (a) False (b) True
39. 39.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
40. 40.True or false: a crowbar is a lever. (a) False (b) True

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