Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 963 · 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.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we measure it (c) we change it
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True
4. 4.True or false: a sloping road is an inclined plane. (a) False (b) True
5. 5.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
6. 6.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
7. 7.⚖️ 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
8. 8.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
9. 9.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a pencil (d) a mirror
12. 12.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
13. 13.True or false: a sloping road uses a pulley. (a) False (b) True
14. 14.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
15. 15.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it can hurt your finger (d) it turns blue
16. 16.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
17. 17.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
18. 18.⚙️ Which of these uses a pulley? (a) a slide (b) a well pulley (c) a steering wheel (d) a doorknob
19. 19.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the bench (c) on the blackboard (d) in the tap
20. 20.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
21. 21.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) harder (d) impossible
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
23. 23.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) a pencil (d) a small paper cup
24. 24.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
25. 25.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
26. 26.⚙️ Which of these is a wheel and axle? (a) a crane (b) a doorknob (c) a crowbar (d) a bottle opener
27. 27.⚖️ 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) the same string (c) how hard we must pull
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) coins as the load (d) a small paper cup
29. 29.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) the rope gets shorter (d) water gets lighter
30. 30.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
31. 31.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
32. 32.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) coins as the load (c) an empty thread reel (d) a pencil
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) yeast (d) an empty thread reel
35. 35.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) a mirror (d) a pencil
37. 37.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
38. 38.⚖️ 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 measure it (c) we change it
39. 39.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 40 cm (d) 5 cm
40. 40.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False

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