Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 550 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a mirror (c) a pencil (d) a small paper cup
2. 2.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
3. 3.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
4. 4.⚖️ 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
5. 5.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a mirror (c) coins as the load (d) a small paper cup
7. 7.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
8. 8.🛟 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
9. 9.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
10. 10.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
11. 11.True or false: a sloping road uses a pulley. (a) False (b) True
12. 12.⚖️ 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
13. 13.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
14. 14.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
15. 15.⚖️ 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 change it (c) we measure it
16. 16.⚙️ Which of these uses a pulley? (a) a crane (b) a ramp (c) a doorknob (d) a sloping road
17. 17.True or false: a crane uses a pulley. (a) False (b) True
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a magnet (d) coins as the load
19. 19.⚖️ 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
20. 20.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
21. 21.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
22. 22.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) nail (d) rope
23. 23.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a crane (c) a well pulley (d) a tap handle
24. 24.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
26. 26.⚖️ 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
27. 27.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the flagpole (c) on the blackboard (d) on the bench
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
29. 29.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) a small paper cup (c) a pencil (d) an empty thread reel
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
32. 32.⚙️ Which of these is a lever? (a) a steering wheel (b) a spoon lifting a lid (c) a well pulley (d) a slide
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) number of pulleys (c) the same string (d) the lifting height
34. 34.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
35. 35.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
36. 36.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a crane (c) a ramp (d) a well pulley
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) a pencil (d) yeast
38. 38.⚖️ 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
39. 39.⚙️ Which of these uses a pulley? (a) a crowbar (b) a sloping road (c) a see-saw (d) a well pulley
40. 40.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle

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