Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 543 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) a pencil (d) yeast
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) coins as the load (d) a balloon
3. 3.⚙️ Which of these uses a pulley? (a) a flagpole (b) a see-saw (c) a steering wheel (d) a doorknob
4. 4.⚖️ 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 keep it the same (c) we measure it
5. 5.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
6. 6.True or false: string is needed for the thread-reel pulley. (a) False (b) True
7. 7.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
8. 8.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a ramp (c) a doorknob (d) a crowbar
9. 9.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) pulling down is easier (d) water gets lighter
10. 10.True or false: a doorknob is an inclined plane. (a) True (b) False
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) number of pulleys (c) how hard we must pull
12. 12.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
13. 13.⚖️ 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 keep it the same (c) we change it
14. 14.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a sloping road (c) a bottle opener (d) a crane
15. 15.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the blackboard (c) on the flagpole (d) on the bench
16. 16.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it gets wet (d) it turns blue
17. 17.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
18. 18.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) sideways (d) down
19. 19.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) coins as the load (c) a mirror (d) yeast
21. 21.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a crowbar (c) a ramp (d) a steering wheel
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) a pencil (d) string
23. 23.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
24. 24.⚙️ Which of these uses a pulley? (a) a sloping road (b) a see-saw (c) a crowbar (d) a crane
25. 25.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
26. 26.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
27. 27.⚖️ 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
28. 28.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) adds weight (d) halves the weight
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the lifting height (c) the same cup of coins (d) number of pulleys
30. 30.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a battery cell (c) an empty thread reel (d) a balloon
32. 32.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it might sing (d) it is magnetic
33. 33.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
34. 34.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
35. 35.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
36. 36.True or false: a tap handle is a wheel and axle. (a) False (b) True
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) string (d) coins as the load
39. 39.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
40. 40.⚖️ 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

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