Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 591 · 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 sloping road? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the lifting height (c) number of pulleys (d) the same string
3. 3.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
4. 4.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
5. 5.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
6. 6.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) yeast (d) a pencil
8. 8.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) yeast (c) a magnet (d) a small paper cup
10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a mirror (c) an empty thread reel (d) a small paper cup
11. 11.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) impossible (d) the same
12. 12.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) makes it magnetic (d) adds weight
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) string (d) a magnet
14. 14.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
16. 16.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) pulling down is easier (d) the bucket floats
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a battery cell (d) a pencil
18. 18.⚙️ Which of these is a lever? (a) a flagpole (b) a steering wheel (c) a see-saw (d) a slide
19. 19.⚖️ 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
20. 20.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the same cup of coins (c) how hard we must pull (d) the same string
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a battery cell (c) a balloon (d) a magnet
23. 23.⚖️ 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
24. 24.True or false: a slide is a lever. (a) False (b) True
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) turmeric powder (c) a small paper cup (d) an empty thread reel
26. 26.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it is magnetic (d) it gets hot
27. 27.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
28. 28.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) coins as the load (d) a mirror
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
31. 31.⚖️ 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 measure it (c) we keep it the same
32. 32.⚙️ Which of these is a lever? (a) a bottle opener (b) a crane (c) a ramp (d) a flagpole
33. 33.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
34. 34.⚖️ 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 measure it (c) we keep it the same
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
36. 36.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
37. 37.⚖️ 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
38. 38.True or false: a bottle opener uses a pulley. (a) True (b) False
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a battery cell (d) an empty thread reel
40. 40.True or false: a see-saw is a lever. (a) True (b) False

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