Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 720 · 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 not needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) string (d) a small paper cup
2. 2.⚖️ 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 lifting height (d) how hard we must pull
3. 3.⚙️ Which of these is a lever? (a) a tap handle (b) a steering wheel (c) a see-saw (d) a crane
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) False (b) True
5. 5.True or false: a bottle opener is a wheel and axle. (a) True (b) False
6. 6.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
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: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
9. 9.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a flagpole (c) a steering wheel (d) a tap handle
10. 10.⚖️ 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
11. 11.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
12. 12.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a battery cell (c) yeast (d) a small paper cup
14. 14.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
15. 15.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 40 cm (d) 20 cm
16. 16.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) in a circle (d) up
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) coins as the load (d) a balloon
18. 18.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
19. 19.⚙️ Which simple machine is a crane? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
20. 20.True or false: a steering wheel uses a pulley. (a) False (b) True
21. 21.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
22. 22.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
23. 23.True or false: a crane uses a pulley. (a) True (b) False
24. 24.⚖️ 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 string (c) how hard we must pull
25. 25.⚖️ 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
26. 26.⚙️ Which simple machine is a doorknob? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
27. 27.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
28. 28.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
29. 29.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) string (c) turmeric powder (d) a mirror
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) an empty thread reel (c) a small paper cup (d) string
33. 33.True or false: a slide is an inclined plane. (a) False (b) True
34. 34.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a small paper cup (d) a battery cell
36. 36.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
37. 37.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
38. 38.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the bench (c) on the blackboard (d) in the tap
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) False (b) True
40. 40.🏗️ 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

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