Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 650 · 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? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) up (d) down
3. 3.True or false: a ramp is an inclined plane. (a) False (b) True
4. 4.🇮🇳 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
5. 5.⚖️ 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) the lifting height (c) number of pulleys (d) how hard we must pull
6. 6.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
8. 8.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) yeast (c) coins as the load (d) a pencil
10. 10.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) True (b) False
12. 12.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
13. 13.⚙️ Which of these uses a pulley? (a) a see-saw (b) a slide (c) a flagpole (d) a sloping road
14. 14.True or false: a sloping road uses a pulley. (a) False (b) True
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) how hard we must pull (c) number of pulleys (d) the same string
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a battery cell (c) a pencil (d) a small paper cup
17. 17.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
18. 18.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it gets longer (d) it turns blue
19. 19.True or false: a tap handle is a wheel and axle. (a) True (b) False
20. 20.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) a small paper cup (c) string (d) coins as the load
22. 22.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
23. 23.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
24. 24.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) pulling down is easier (c) the rope gets shorter (d) water gets lighter
25. 25.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
26. 26.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
27. 27.⚙️ Which of these uses a pulley? (a) a ramp (b) a well pulley (c) a doorknob (d) a see-saw
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a mirror (c) coins as the load (d) string
29. 29.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) harder (d) easier
30. 30.True or false: a crowbar uses a pulley. (a) True (b) False
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a battery cell (c) a pencil (d) a magnet
32. 32.⚖️ 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
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
35. 35.⚖️ 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
36. 36.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
37. 37.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
38. 38.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a steering wheel (c) a see-saw (d) a spoon lifting a lid
39. 39.⚙️ Which of these uses a pulley? (a) a doorknob (b) a crane (c) a sloping road (d) a slide
40. 40.True or false: string is not needed for the thread-reel pulley. (a) False (b) True

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