Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 177 · 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 turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
2. 2.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
3. 3.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) the same string (c) how hard we must pull
5. 5.🏗️ 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
6. 6.⚖️ 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
7. 7.⚙️ Which of these is a lever? (a) a doorknob (b) a steering wheel (c) a sloping road (d) a bottle opener
8. 8.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a small paper cup (c) a magnet (d) yeast
10. 10.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
11. 11.True or false: a ramp is a wheel and axle. (a) False (b) True
12. 12.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a flagpole (c) a crane (d) a ramp
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) turmeric powder (c) string (d) a small paper cup
14. 14.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
15. 15.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) coins as the load (d) a balloon
17. 17.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a magnet (d) a pencil
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a mirror (c) an empty thread reel (d) coins as the load
20. 20.⚖️ 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 keep it the same (c) we measure it
21. 21.True or false: a sloping road is an inclined plane. (a) False (b) True
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
23. 23.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
24. 24.⚖️ 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
25. 25.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 20 cm (d) 5 cm
26. 26.⚖️ 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
27. 27.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) makes it magnetic (c) adds weight (d) halves the weight
28. 28.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) nail (c) battery (d) magnet
29. 29.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
30. 30.⚖️ 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 keep it the same (b) we measure it (c) we change it
31. 31.⚙️ Which simple machine is a well pulley? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
32. 32.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
33. 33.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
34. 34.True or false: a slide is a lever. (a) False (b) True
35. 35.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the blackboard (d) on the flagpole
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) yeast (c) coins as the load (d) an empty thread reel
37. 37.⚙️ Which of these is a lever? (a) a tap handle (b) a well pulley (c) a see-saw (d) a crane
38. 38.⚖️ 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
39. 39.True or false: a see-saw is a lever. (a) False (b) True
40. 40.⚖️ 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

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