Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 770 · 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 a wheel and axle? (a) a crane (b) a sloping road (c) a slide (d) a steering wheel
2. 2.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
3. 3.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
4. 4.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) in the tap (d) on the bench
5. 5.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it gets longer (d) it turns blue
6. 6.⚙️ Which simple machine is a see-saw? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
7. 7.⚖️ 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
8. 8.True or false: a well pulley is a lever. (a) True (b) False
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
10. 10.True or false: a see-saw uses a pulley. (a) True (b) False
11. 11.True or false: a bottle opener is a wheel and axle. (a) False (b) True
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) string (c) a mirror (d) a magnet
13. 13.True or false: a doorknob is a lever. (a) True (b) False
14. 14.⚖️ 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
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same string (b) how hard we must pull (c) the same cup of coins (d) number of pulleys
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a pencil (d) a balloon
17. 17.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
18. 18.⚙️ Which of these is a lever? (a) a bottle opener (b) a sloping road (c) a doorknob (d) a crane
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a pencil (d) a balloon
20. 20.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) battery (d) nail
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) string (d) yeast
22. 22.⚖️ 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
23. 23.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
24. 24.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) the same (d) harder
25. 25.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a flagpole (c) a steering wheel (d) a sloping road
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a small paper cup (c) yeast (d) turmeric powder
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) an empty thread reel
28. 28.True or false: a sloping road is an inclined plane. (a) True (b) False
29. 29.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) a magnet (d) an empty thread reel
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) a mirror (d) a balloon
31. 31.⚖️ 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 keep it the same (c) we change it
32. 32.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
33. 33.⚙️ Which simple machine is a ramp? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
34. 34.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
35. 35.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it could fall on you (d) it is magnetic
36. 36.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we keep it the same (c) we change it
38. 38.⚖️ 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
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) coins as the load (d) a mirror
40. 40.True or false: a see-saw is a lever. (a) True (b) False

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