Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 344 · 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) a pencil (b) coins as the load (c) a magnet (d) an empty thread reel
2. 2.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 5 cm (d) 40 cm
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) number of pulleys (c) the same cup of coins (d) the same string
4. 4.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) an empty thread reel (d) turmeric powder
6. 6.True or false: a slide is a wheel and axle. (a) True (b) False
7. 7.⚖️ 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 change it (b) we measure it (c) we keep it the same
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) how hard we must pull (c) the same string (d) the same cup of coins
9. 9.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) in a circle (d) up
10. 10.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
11. 11.True or false: a well pulley is a wheel and axle. (a) False (b) True
12. 12.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the blackboard (c) on the flagpole (d) on the bench
13. 13.⚖️ 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
14. 14.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) True (b) False
16. 16.True or false: a see-saw is a lever. (a) True (b) False
17. 17.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
18. 18.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
19. 19.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a tap handle (c) a crowbar (d) a slide
20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) coins as the load (c) yeast (d) an empty thread reel
21. 21.⚖️ 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
22. 22.⚙️ Which of these uses a pulley? (a) a well pulley (b) a tap handle (c) a spoon lifting a lid (d) a crowbar
23. 23.🧺 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
24. 24.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
25. 25.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) nail (d) rope
26. 26.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) changes pull direction (d) halves the weight
27. 27.True or false: a doorknob is a wheel and axle. (a) False (b) True
28. 28.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
29. 29.True or false: a slide uses a pulley. (a) False (b) True
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) a small paper cup (d) a magnet
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
32. 32.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
33. 33.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
34. 34.True or false: a see-saw is a wheel and axle. (a) True (b) False
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) yeast (c) coins as the load (d) a magnet
36. 36.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
37. 37.True or false: a steering wheel is an inclined plane. (a) False (b) True
38. 38.⚖️ 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 change it (c) we keep it the same
39. 39.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
40. 40.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) pulling down is easier (d) the rope gets shorter

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