Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 812 · 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 never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it is magnetic (d) it might sing
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a small paper cup (d) a balloon
3. 3.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) on the flagpole (d) in the tap
4. 4.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same
6. 6.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
7. 7.⚖️ 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) the same string (c) number of pulleys (d) the same cup of coins
8. 8.⚖️ 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
9. 9.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a well pulley (c) a tap handle (d) a slide
10. 10.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) coins as the load (d) a battery cell
12. 12.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
14. 14.True or false: a crane uses a pulley. (a) False (b) True
15. 15.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
16. 16.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 40 cm (d) 20 cm
17. 17.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
18. 18.⚖️ 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
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) a magnet (d) a small paper cup
20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) a pencil (c) string (d) an empty thread reel
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a small paper cup (c) an empty thread reel (d) a pencil
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
23. 23.True or false: a steering wheel uses a pulley. (a) False (b) True
24. 24.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
25. 25.True or false: a flagpole uses a pulley. (a) True (b) False
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we change it (c) we measure it
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) an empty thread reel (d) string
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) a pencil (d) an empty thread reel
29. 29.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
30. 30.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) battery (d) rope
31. 31.True or false: a well pulley uses a pulley. (a) True (b) False
32. 32.True or false: a ramp is a lever. (a) False (b) True
33. 33.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) string (d) a mirror
35. 35.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
36. 36.⚖️ 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
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) string (c) a small paper cup (d) an empty thread reel
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) yeast (d) a magnet
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a small paper cup (c) a pencil (d) an empty thread reel
40. 40.⚙️ Which of these is a lever? (a) a ramp (b) a steering wheel (c) a crowbar (d) a tap handle

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