Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 776 · 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.⚖️ 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 same string (c) number of pulleys (d) the lifting height
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) yeast (d) coins as the load
3. 3.True or false: a crowbar is an inclined plane. (a) False (b) True
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a magnet (c) string (d) an empty thread reel
5. 5.⚙️ Which of these is a lever? (a) a steering wheel (b) a sloping road (c) a bottle opener (d) a doorknob
6. 6.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) sideways (d) up
7. 7.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a pencil (c) string (d) an empty thread reel
9. 9.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
10. 10.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
11. 11.⚖️ 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) True (b) False
12. 12.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
13. 13.⚖️ 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
14. 14.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
15. 15.⚖️ 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
16. 16.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) the same (d) about half
17. 17.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) a small paper cup (d) a balloon
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a pencil (c) yeast (d) turmeric powder
20. 20.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
21. 21.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
22. 22.⚖️ 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 measure it (c) we keep it the same
23. 23.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
24. 24.⚙️ Which simple machine is a crane? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) a pencil (d) a battery cell
27. 27.True or false: a see-saw uses a pulley. (a) True (b) False
28. 28.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) a balloon (d) a mirror
30. 30.🛟 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
31. 31.⚙️ Which of these is a lever? (a) a flagpole (b) a sloping road (c) a see-saw (d) a tap handle
32. 32.True or false: a tap handle is a wheel and axle. (a) True (b) False
33. 33.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) the rope gets shorter (d) pulling down is easier
34. 34.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the same cup of coins (c) number of pulleys (d) the lifting height
36. 36.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a flagpole (c) a tap handle (d) a spoon lifting a lid
37. 37.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
38. 38.True or false: a ramp is an inclined plane. (a) False (b) True
39. 39.⚖️ 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
40. 40.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane

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