Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 326 · 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.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
2. 2.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
3. 3.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a balloon (d) string
5. 5.⚙️ Which of these is a lever? (a) a steering wheel (b) a doorknob (c) a slide (d) a spoon lifting a lid
6. 6.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
7. 7.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
8. 8.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
9. 9.⚙️ Which of these uses a pulley? (a) a ramp (b) a steering wheel (c) a slide (d) a crane
10. 10.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) the same (d) zero
11. 11.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
12. 12.🧺 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 small paper cup (d) turmeric powder
13. 13.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
14. 14.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it gets wet (d) it can hurt your finger
15. 15.⚖️ 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 change it (c) we measure it
16. 16.True or false: a flagpole is a wheel and axle. (a) True (b) False
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) False (b) True
18. 18.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
19. 19.⚙️ Which of these is a lever? (a) a steering wheel (b) a crane (c) a sloping road (d) a crowbar
20. 20.True or false: a steering wheel is a wheel and axle. (a) True (b) False
21. 21.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
22. 22.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
23. 23.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) the same string (c) the same cup of coins (d) how hard we must pull
25. 25.True or false: a tap handle uses a pulley. (a) True (b) False
26. 26.⚖️ 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) how hard we must pull (c) the lifting height (d) number of pulleys
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) a pencil (d) yeast
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) string (c) a small paper cup (d) an empty thread reel
29. 29.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) string (c) a mirror (d) yeast
31. 31.⚖️ 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
32. 32.⚖️ 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
33. 33.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
34. 34.True or false: a slide is an inclined plane. (a) True (b) False
35. 35.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
36. 36.True or false: string is needed for the thread-reel pulley. (a) False (b) True
37. 37.🧺 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
38. 38.⚙️ Which of these uses a pulley? (a) a ramp (b) a bottle opener (c) a well pulley (d) a spoon lifting a lid
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) an empty thread reel (c) a magnet (d) a battery cell
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) a balloon (d) yeast

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