Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 907 · 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 what we measure? (a) the same cup of coins (b) how hard we must pull (c) the same string (d) number of pulleys
2. 2.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
3. 3.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) battery (d) nail
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) coins as the load (c) a magnet (d) a battery cell
5. 5.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it gets hot (d) it could fall on you
6. 6.⚖️ 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
7. 7.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) on the flagpole (d) in the tap
8. 8.⚖️ 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
9. 9.True or false: a well pulley is a lever. (a) False (b) True
10. 10.⚖️ 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 cup of coins (c) number of pulleys
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a mirror (c) yeast (d) an empty thread reel
12. 12.True or false: a well pulley uses a pulley. (a) True (b) False
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
14. 14.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
15. 15.🏗️ 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
16. 16.True or false: a ramp is an inclined plane. (a) False (b) True
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) string (d) yeast
19. 19.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
20. 20.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
21. 21.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
22. 22.True or false: a flagpole is a wheel and axle. (a) False (b) True
23. 23.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
24. 24.⚙️ Which of these is a lever? (a) a slide (b) a sloping road (c) a bottle opener (d) a flagpole
25. 25.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 10 cm (d) 40 cm
26. 26.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a flagpole (c) a steering wheel (d) a crane
27. 27.⚖️ 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 lifting height
28. 28.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
29. 29.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) an empty thread reel (d) a battery cell
30. 30.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
31. 31.⚖️ 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 change it (c) we measure it
32. 32.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
33. 33.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
34. 34.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
35. 35.⚖️ 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
36. 36.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) the same (d) impossible
37. 37.True or false: a crowbar is an inclined plane. (a) True (b) False
38. 38.True or false: a crowbar uses a pulley. (a) True (b) False
39. 39.⚖️ 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
40. 40.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a bottle opener (c) a steering wheel (d) a spoon lifting a lid

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