Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 520 · 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.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 10 cm (d) 20 cm
2. 2.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
3. 3.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it is magnetic (d) it could fall on you
4. 4.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
5. 5.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
6. 6.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the bench (d) on the flagpole
7. 7.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
8. 8.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) pulling down is easier (c) the bucket floats (d) water gets lighter
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) turmeric powder (c) a small paper cup (d) a pencil
10. 10.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) string (c) yeast (d) turmeric powder
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a pencil (c) a balloon (d) a battery cell
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a pencil (d) a battery cell
14. 14.True or false: a see-saw is an inclined plane. (a) True (b) False
15. 15.⚖️ 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) how hard we must pull (c) the lifting height
16. 16.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) the same (d) about half
17. 17.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a flagpole (c) a see-saw (d) a ramp
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a pencil (d) yeast
19. 19.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
20. 20.⚖️ 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) the same cup of coins (c) the same string (d) how hard we must pull
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same
22. 22.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
23. 23.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) a small paper cup (d) a magnet
25. 25.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) up (d) in a circle
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) a magnet (d) turmeric powder
27. 27.⚖️ 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) True (b) False
28. 28.⚖️ 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
29. 29.⚙️ Which of these is a lever? (a) a well pulley (b) a steering wheel (c) a doorknob (d) a bottle opener
30. 30.⚙️ Which of these is a lever? (a) a steering wheel (b) a crane (c) a flagpole (d) a spoon lifting a lid
31. 31.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
32. 32.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
33. 33.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) battery (d) nail
34. 34.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
35. 35.⚖️ 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 change it (c) we measure it
36. 36.True or false: a flagpole is a wheel and axle. (a) True (b) False
37. 37.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
38. 38.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) harder (d) easier
39. 39.⚖️ 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) how hard we must pull (c) the lifting height (d) the same string
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) an empty thread reel (d) a battery cell

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