Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 200 · 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 yeast for the thread-reel pulley? (a) needed (b) not needed
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) the lifting height (b) the same cup of coins (c) number of pulleys (d) how hard we must pull
3. 3.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it turns blue (d) it gets longer
4. 4.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) a magnet (d) string
6. 6.🧺 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) turmeric powder (d) a pencil
7. 7.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
8. 8.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
10. 10.⚖️ 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 string
11. 11.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
12. 12.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
13. 13.True or false: a doorknob uses a pulley. (a) True (b) False
14. 14.⚖️ 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 keep it the same (b) we measure it (c) we change it
15. 15.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
16. 16.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
17. 17.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a see-saw (c) a flagpole (d) a spoon lifting a lid
18. 18.🧺 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) yeast
19. 19.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
20. 20.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a ramp (c) a doorknob (d) a crowbar
21. 21.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
22. 22.True or false: a pencil is not 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 cup of coins is kept the same. (a) True (b) False
24. 24.⚖️ 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) how hard we must pull (c) the same cup of coins (d) number of pulleys
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) coins as the load (c) a small paper cup (d) an empty thread reel
26. 26.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it is magnetic (d) it might sing
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) yeast (c) a magnet (d) coins as the load
28. 28.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
30. 30.True or false: a crane uses a pulley. (a) True (b) False
31. 31.⚙️ Which of these is a lever? (a) a bottle opener (b) a crane (c) a doorknob (d) a well pulley
32. 32.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
33. 33.True or false: a crane is a wheel and axle. (a) True (b) False
34. 34.⚖️ 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) False (b) True
35. 35.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 5 cm (d) 20 cm
36. 36.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) adds weight (c) halves the weight (d) makes it magnetic
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) turmeric powder (d) an empty thread reel
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a small paper cup (d) turmeric powder
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a magnet (d) an empty thread reel
40. 40.True or false: a doorknob is a lever. (a) False (b) True

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