Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 463 · 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 string (b) how hard we must pull (c) number of pulleys (d) the same cup of coins
2. 2.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) adds weight (d) changes pull direction
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a magnet (d) an empty thread reel
4. 4.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
5. 5.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
6. 6.🇮🇳 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
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) yeast (d) coins as the load
8. 8.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
9. 9.⚙️ Which of these is a lever? (a) a well pulley (b) a flagpole (c) a steering wheel (d) a bottle opener
10. 10.⚙️ Which of these is a lever? (a) a tap handle (b) a crowbar (c) a well pulley (d) a doorknob
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) coins as the load (d) string
12. 12.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
13. 13.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) magnet (d) battery
14. 14.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
15. 15.True or false: a see-saw is a lever. (a) False (b) True
16. 16.🛟 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
17. 17.⚖️ 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
18. 18.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a doorknob (c) a tap handle (d) a sloping road
19. 19.True or false: a see-saw uses a pulley. (a) False (b) True
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) turmeric powder (c) a balloon (d) a magnet
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
22. 22.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) the rope gets shorter (d) pulling down is easier
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
24. 24.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
25. 25.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
26. 26.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
27. 27.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
28. 28.True or false: a well pulley is an inclined plane. (a) False (b) True
29. 29.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
30. 30.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
31. 31.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
32. 32.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets longer (d) it gets wet
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) a pencil (d) a mirror
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) coins as the load (d) turmeric powder
35. 35.True or false: a steering wheel is a wheel and axle. (a) True (b) False
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) the lifting height (c) how hard we must pull (d) the same string
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a balloon (c) a battery cell (d) a mirror
38. 38.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) impossible (d) easier
39. 39.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
40. 40.⚖️ 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 keep it the same (b) we measure it (c) we change it

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