Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 875 · 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 a lever? (a) a flagpole (b) a well pulley (c) a crane (d) a see-saw
2. 2.⚖️ 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) the same string (c) number of pulleys
3. 3.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
4. 4.⚖️ 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) the lifting height (c) number of pulleys (d) the same string
5. 5.⚖️ 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
6. 6.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) turmeric powder (d) a small paper cup
8. 8.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it could fall on you (d) it gets hot
9. 9.🏗️ 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
10. 10.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
11. 11.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the flagpole (c) in the tap (d) on the blackboard
12. 12.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) zero (d) double
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) turmeric powder (c) an empty thread reel (d) coins as the load
14. 14.⚖️ 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 keep it the same (c) we measure it
15. 15.⚖️ 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
16. 16.⚙️ Which of these is a wheel and axle? (a) a slide (b) a well pulley (c) a steering wheel (d) a crowbar
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) coins as the load (c) a mirror (d) string
18. 18.⚙️ Which simple machine is a ramp? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
19. 19.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
20. 20.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a crowbar (c) a slide (d) a tap handle
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) coins as the load (d) a mirror
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) a pencil (d) string
23. 23.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
24. 24.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) battery (d) rope
25. 25.True or false: a bottle opener uses a pulley. (a) True (b) False
26. 26.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) turmeric powder (d) yeast
28. 28.True or false: a see-saw is a lever. (a) False (b) True
29. 29.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
30. 30.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
31. 31.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
32. 32.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
33. 33.⚙️ Which of these uses a pulley? (a) a tap handle (b) a crane (c) a see-saw (d) a steering wheel
34. 34.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) halves the weight (c) changes pull direction (d) adds weight
35. 35.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) number of pulleys (c) how hard we must pull
38. 38.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
39. 39.⚖️ 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
40. 40.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed

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