Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 581 · 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.🧺 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) turmeric powder (d) an empty thread reel
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) coins as the load (d) a small paper cup
3. 3.True or false: a flagpole is an inclined plane. (a) True (b) False
4. 4.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
5. 5.⚖️ 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) how hard we must pull (c) the same string (d) the lifting height
6. 6.⚖️ 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
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
8. 8.True or false: a doorknob is a wheel and axle. (a) True (b) False
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we keep it the same (c) we measure it
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
11. 11.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
12. 12.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it is magnetic (d) it could fall on you
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same cup of coins (b) number of pulleys (c) the same string (d) how hard we must pull
14. 14.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
16. 16.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 10 cm (d) 5 cm
17. 17.⚖️ 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
18. 18.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
19. 19.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) the same (d) harder
20. 20.⚖️ 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
21. 21.🇮🇳 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
22. 22.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
23. 23.True or false: a well pulley uses a pulley. (a) True (b) False
24. 24.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
25. 25.True or false: a bottle opener is a lever. (a) False (b) True
26. 26.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
27. 27.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a see-saw (c) a slide (d) a doorknob
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
29. 29.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) up (d) down
30. 30.⚖️ 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
31. 31.True or false: a bottle opener uses a pulley. (a) False (b) True
32. 32.⚖️ 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
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) string (c) yeast (d) a mirror
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a pencil (d) a magnet
35. 35.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
36. 36.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
37. 37.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
38. 38.True or false: a slide 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 “how hard we must pull”? (a) we keep it the same (b) we change it (c) we measure it
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) False (b) True

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