Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 131 · 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.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) string (d) yeast
3. 3.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
4. 4.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
5. 5.⚖️ 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 keep it the same (c) we change it
6. 6.⚙️ Which of these is a lever? (a) a well pulley (b) a ramp (c) a crowbar (d) a steering wheel
7. 7.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
8. 8.⚖️ 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) number of pulleys (c) how hard we must pull (d) the lifting height
9. 9.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a well pulley (c) a slide (d) a see-saw
10. 10.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) pulling down is easier (c) the bucket floats (d) water gets lighter
11. 11.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
12. 12.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) down (d) up
13. 13.⚖️ 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 measure it (b) we change it (c) we keep it the same
14. 14.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) double (d) the same
15. 15.🧺 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) turmeric powder
16. 16.True or false: a doorknob is a wheel and axle. (a) False (b) True
17. 17.⚖️ 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
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) a magnet (d) coins as the load
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) yeast (d) a mirror
20. 20.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a sloping road (c) a doorknob (d) a see-saw
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a mirror (c) a pencil (d) a small paper cup
22. 22.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
23. 23.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) a magnet (d) coins as the load
24. 24.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a steering wheel (c) a crane (d) a doorknob
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same
26. 26.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 5 cm (d) 10 cm
27. 27.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it can hurt your finger (d) it gets longer
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) number of pulleys (c) the lifting height (d) how hard we must pull
29. 29.🧺 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
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a small paper cup (d) yeast
31. 31.⚖️ 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
32. 32.⚖️ 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
33. 33.True or false: a doorknob is an inclined plane. (a) True (b) False
34. 34.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
35. 35.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it gets hot (d) it could fall on you
36. 36.True or false: a spoon lifting a lid is a lever. (a) True (b) False
37. 37.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
38. 38.True or false: a flagpole uses a pulley. (a) True (b) False
39. 39.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
40. 40.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False

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