Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 43 · 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.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
2. 2.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the lifting height
4. 4.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) up (d) down
5. 5.🧺 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) a battery cell
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) turmeric powder (d) a pencil
7. 7.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it is magnetic (d) it gets hot
8. 8.⚖️ 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 measure it (b) we keep it the same (c) we change it
9. 9.⚖️ 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
10. 10.True or false: a see-saw uses a pulley. (a) True (b) False
11. 11.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
12. 12.⚖️ 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 same string
13. 13.⚙️ Which simple machine is a well pulley? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
14. 14.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
15. 15.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a mirror (d) a pencil
17. 17.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
18. 18.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
19. 19.True or false: a well pulley is a lever. (a) True (b) False
20. 20.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
21. 21.🧺 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 balloon (d) an empty thread reel
22. 22.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
23. 23.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the bench (c) in the tap (d) on the blackboard
24. 24.True or false: a tap handle is a lever. (a) True (b) False
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) turmeric powder (d) string
26. 26.⚖️ 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
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) an empty thread reel (d) a magnet
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) yeast (c) a pencil (d) an empty thread reel
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) coins as the load (c) a balloon (d) a battery cell
30. 30.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
31. 31.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a pencil (d) yeast
33. 33.⚙️ Which of these is a lever? (a) a see-saw (b) a sloping road (c) a flagpole (d) a tap handle
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a battery cell (d) coins as the load
35. 35.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
36. 36.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
37. 37.⚖️ 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
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins (d) the lifting height
39. 39.🧺 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 mirror (d) an empty thread reel
40. 40.⚙️ Which of these uses a pulley? (a) a slide (b) a ramp (c) a well pulley (d) a crowbar

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