Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 82 · 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.⚖️ 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
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) the same (d) zero
3. 3.⚖️ 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
4. 4.⚙️ Which of these is a lever? (a) a crowbar (b) a crane (c) a flagpole (d) a ramp
5. 5.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) the rope gets shorter (d) pulling down is easier
6. 6.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) the same string (c) number of pulleys
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) string (c) a small paper cup (d) coins as the load
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) how hard we must pull (c) number of pulleys
10. 10.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) magnet (d) battery
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
12. 12.True or false: a tap handle is an inclined plane. (a) True (b) False
13. 13.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 5 cm (d) 40 cm
14. 14.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
15. 15.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) the same (d) impossible
16. 16.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) coins as the load (d) a balloon
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) a small paper cup (d) an empty thread reel
19. 19.⚙️ Which of these uses a pulley? (a) a doorknob (b) a crane (c) a crowbar (d) a ramp
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a balloon (d) a small paper cup
21. 21.🇮🇳 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
22. 22.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
23. 23.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
24. 24.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
25. 25.True or false: a crowbar uses a pulley. (a) False (b) True
26. 26.True or false: a doorknob is a lever. (a) False (b) True
27. 27.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it gets hot (d) it could fall on you
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) a mirror (d) a small paper cup
29. 29.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
30. 30.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) a battery cell (d) a pencil
32. 32.⚙️ Which simple machine is a see-saw? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
33. 33.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) an empty thread reel (c) coins as the load (d) a small paper cup
35. 35.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it turns blue (d) it gets longer
36. 36.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
37. 37.⚖️ 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
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the lifting height
39. 39.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
40. 40.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed

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