Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 898 · 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.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) a mirror (d) string
3. 3.True or false: a crowbar is a lever. (a) False (b) True
4. 4.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
5. 5.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a see-saw (c) a crane (d) a well pulley
6. 6.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a pencil (c) yeast (d) a balloon
8. 8.⚖️ 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
9. 9.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
10. 10.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
11. 11.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
12. 12.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) the bucket floats (d) pulling down is easier
13. 13.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
14. 14.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
15. 15.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
16. 16.🧺 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 balloon
17. 17.⚖️ 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 measure it (b) we keep it the same (c) we change it
18. 18.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
19. 19.⚖️ 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) how hard we must pull (c) number of pulleys
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same cup of coins (b) the lifting height (c) number of pulleys (d) the same string
22. 22.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) a balloon (d) an empty thread reel
25. 25.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) easier (d) impossible
26. 26.True or false: a well pulley uses a pulley. (a) True (b) False
27. 27.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
28. 28.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) rope (d) battery
29. 29.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
30. 30.⚖️ 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) False (b) True
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) turmeric powder (c) a magnet (d) string
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a pencil (d) turmeric powder
33. 33.⚖️ 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 same cup of coins
34. 34.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) yeast (c) a battery cell (d) a balloon
36. 36.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a well pulley (c) a spoon lifting a lid (d) a tap handle
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a pencil (c) an empty thread reel (d) string
38. 38.True or false: a sloping road uses a pulley. (a) False (b) True
39. 39.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
40. 40.True or false: a slide is an inclined plane. (a) True (b) False

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