Pulley STEM Project Worksheet

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

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids