Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 596 · 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? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.⚖️ 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
3. 3.⚖️ 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 change it (c) we keep it the same
4. 4.⚖️ 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 same cup of coins
5. 5.🛟 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
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) turmeric powder (d) an empty thread reel
7. 7.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
8. 8.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
9. 9.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
10. 10.⚖️ 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
11. 11.True or false: a bottle opener is a wheel and axle. (a) False (b) True
12. 12.⚖️ 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 keep it the same (c) we measure it
13. 13.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
14. 14.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
15. 15.True or false: a doorknob uses a pulley. (a) False (b) True
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the same cup of coins (c) how hard we must pull (d) the lifting height
17. 17.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it turns blue (d) it can hurt your finger
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) an empty thread reel (c) coins as the load (d) a pencil
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) an empty thread reel (d) a magnet
20. 20.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) in the tap (c) on the bench (d) on the blackboard
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) an empty thread reel (d) a mirror
22. 22.🧺 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) string (d) a mirror
23. 23.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) turmeric powder (c) a pencil (d) a magnet
25. 25.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) sideways (d) in a circle
26. 26.⚖️ 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
27. 27.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
29. 29.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
31. 31.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
32. 32.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) pulling down is easier (c) water gets lighter (d) the bucket floats
33. 33.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
34. 34.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) adds weight (d) makes it magnetic
35. 35.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
36. 36.⚖️ 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 lifting height
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) False (b) True
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) a mirror (d) string
39. 39.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a slide (c) a crowbar (d) a steering wheel
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) a pencil (c) coins as the load (d) a small paper cup

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