Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 92 · 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 of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) an empty thread reel (d) a balloon
2. 2.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
3. 3.True or false: a crowbar is an inclined plane. (a) False (b) True
4. 4.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) double (d) zero
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we keep it the same (c) we change it
6. 6.⚖️ 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) the lifting height (c) number of pulleys
7. 7.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a crowbar (c) a bottle opener (d) a spoon lifting a lid
8. 8.True or false: a well pulley uses a pulley. (a) True (b) False
9. 9.⚖️ 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 change it (b) we keep it the same (c) we measure it
10. 10.⚖️ 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 keep it the same (c) we change it
11. 11.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
12. 12.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
13. 13.True or false: a tap handle is a wheel and axle. (a) False (b) True
14. 14.⚖️ 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
15. 15.⚖️ 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 lifting height (d) the same cup of coins
16. 16.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) harder (d) easier
17. 17.⚖️ 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 string (b) the same cup of coins (c) number of pulleys (d) how hard we must pull
18. 18.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
19. 19.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
20. 20.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
21. 21.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) a pencil (d) a small paper cup
23. 23.⚖️ 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
24. 24.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) turmeric powder (c) a balloon (d) yeast
26. 26.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
27. 27.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
28. 28.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 20 cm (d) 10 cm
29. 29.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
30. 30.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
31. 31.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
33. 33.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
34. 34.🧺 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 balloon (d) a pencil
35. 35.True or false: a bottle opener uses a pulley. (a) False (b) True
36. 36.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a ramp (c) a crane (d) a tap handle
37. 37.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
38. 38.True or false: a bottle opener is a wheel and axle. (a) True (b) False
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) an empty thread reel (d) turmeric powder

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