Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 167 · 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 crowbar? (a) an inclined plane (b) a pulley (c) a wheel and axle (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 change it (b) we keep it the same (c) we measure it
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) coins as the load (d) a balloon
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
5. 5.⚖️ 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 lifting height (c) how hard we must pull
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) a battery cell (d) a pencil
7. 7.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
8. 8.⚙️ Which simple machine is a crane? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
9. 9.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
10. 10.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
11. 11.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) coins as the load (c) a balloon (d) a small paper cup
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) a balloon (d) a pencil
14. 14.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a battery cell (d) a small paper cup
16. 16.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
17. 17.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) in the tap (d) on the flagpole
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) a magnet (d) yeast
19. 19.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
20. 20.⚖️ 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) False (b) True
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a small paper cup (d) turmeric powder
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) yeast (d) a pencil
23. 23.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) coins as the load (d) turmeric powder
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) string (d) a magnet
25. 25.⚙️ Which of these is a lever? (a) a ramp (b) a spoon lifting a lid (c) a crane (d) a flagpole
26. 26.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a doorknob (c) a well pulley (d) a spoon lifting a lid
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) an empty thread reel (d) a mirror
28. 28.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
29. 29.⚖️ 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) number of pulleys (c) the lifting height (d) how hard we must pull
30. 30.⚖️ 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 keep it the same (c) we measure it
31. 31.🏗️ 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
32. 32.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
33. 33.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
34. 34.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
35. 35.⚖️ 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 keep it the same (c) we measure it
36. 36.⚖️ 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 change it (b) we measure it (c) we keep it the same
37. 37.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
38. 38.⚖️ 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) False (b) True
39. 39.True or false: a steering wheel is an inclined plane. (a) False (b) True
40. 40.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier

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