Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 201 · 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.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
2. 2.⚖️ 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
3. 3.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the flagpole (c) on the blackboard (d) in the tap
4. 4.⚖️ 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) the same cup of coins (c) how hard we must pull
5. 5.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a steering wheel (c) a ramp (d) a well pulley
6. 6.⚖️ 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 measure it (b) we keep it the same (c) we change it
7. 7.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
8. 8.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a ramp (c) a crowbar (d) a crane
9. 9.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
10. 10.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
11. 11.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
12. 12.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
13. 13.True or false: a doorknob is a wheel and axle. (a) True (b) False
14. 14.True or false: turmeric powder 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 what we measure? (a) the same string (b) number of pulleys (c) the same cup of coins (d) how hard we must pull
16. 16.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) yeast (d) an empty thread reel
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a battery cell (c) a small paper cup (d) a pencil
19. 19.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) the same (d) double
20. 20.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
21. 21.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) the rope gets shorter (d) pulling down is easier
22. 22.True or false: a slide is an inclined plane. (a) False (b) True
23. 23.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
24. 24.True or false: a steering wheel is a wheel and axle. (a) True (b) False
25. 25.⚖️ 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 change it (c) we keep it the same
26. 26.True or false: a bottle opener is a lever. (a) True (b) False
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) yeast (c) a pencil (d) a small paper cup
28. 28.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a see-saw (c) a bottle opener (d) a doorknob
29. 29.⚖️ 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 measure it (c) we keep it the same
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) string (c) a magnet (d) a battery cell
31. 31.⚖️ 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) the lifting height (c) number of pulleys (d) how hard we must pull
32. 32.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets longer (d) it gets wet
33. 33.⚙️ Which of these is a lever? (a) a flagpole (b) a steering wheel (c) a see-saw (d) a ramp
34. 34.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
35. 35.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
36. 36.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it might sing (d) it could fall on you
37. 37.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
38. 38.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
39. 39.⚙️ Which simple machine is a flagpole? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
40. 40.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) rope (d) nail

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