Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 85 · 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.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
2. 2.⚖️ 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
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) string (c) a small paper cup (d) a pencil
4. 4.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a small paper cup (c) string (d) coins as the load
6. 6.⚙️ Which of these is a lever? (a) a bottle opener (b) a crane (c) a well pulley (d) a tap handle
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a magnet (c) an empty thread reel (d) a pencil
8. 8.⚖️ 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
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) yeast (d) a small paper cup
10. 10.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) nail (d) rope
11. 11.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) a battery cell (d) a magnet
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
14. 14.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
15. 15.⚙️ Which of these uses a pulley? (a) a ramp (b) a doorknob (c) a spoon lifting a lid (d) a well pulley
16. 16.🛟 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
17. 17.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
18. 18.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) double (d) the same
19. 19.⚖️ 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) number of pulleys (d) the same string
20. 20.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it gets longer (d) it turns blue
21. 21.⚖️ 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
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
23. 23.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) in the tap (d) on the flagpole
24. 24.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
25. 25.True or false: a flagpole uses a pulley. (a) False (b) True
26. 26.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
27. 27.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) changes pull direction (d) adds weight
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 measure it (b) we change it (c) we keep it the same
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
30. 30.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
31. 31.True or false: a ramp uses a pulley. (a) False (b) True
32. 32.⚙️ Which of these uses a pulley? (a) a ramp (b) a flagpole (c) a steering wheel (d) a slide
33. 33.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a crowbar (c) a crane (d) a steering wheel
34. 34.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) easier (d) impossible
35. 35.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
36. 36.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) yeast (d) a small paper cup
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) number of pulleys (b) the same cup of coins (c) how hard we must pull (d) the same string
39. 39.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a sloping road (c) a crowbar (d) a see-saw
40. 40.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False

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