Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 613 · 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? True or false: the lifting height is what we measure. (a) True (b) False
2. 2.⚖️ 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
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
4. 4.⚙️ Which simple machine is a well pulley? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
5. 5.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
6. 6.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) a battery cell (d) an empty thread reel
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) an empty thread reel (c) coins as the load (d) a pencil
9. 9.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) makes it magnetic (d) changes pull direction
10. 10.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
11. 11.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
12. 12.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
13. 13.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
14. 14.🏗️ 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
15. 15.⚖️ 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
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) string (c) coins as the load (d) an empty thread reel
17. 17.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
18. 18.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
19. 19.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) coins as the load (c) a pencil (d) an empty thread reel
21. 21.⚖️ 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
22. 22.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
23. 23.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it gets longer (d) it turns blue
24. 24.True or false: a tap handle is a wheel and axle. (a) False (b) True
25. 25.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it gets hot (d) it is magnetic
26. 26.⚖️ 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) how hard we must pull (d) number of pulleys
27. 27.⚖️ 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
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a small paper cup (c) turmeric powder (d) yeast
29. 29.⚖️ 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) False (b) True
30. 30.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the rope gets shorter (c) water gets lighter (d) the bucket floats
31. 31.True or false: a slide is an inclined plane. (a) True (b) False
32. 32.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the flagpole (c) on the blackboard (d) on the bench
33. 33.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) an empty thread reel (c) a mirror (d) a battery cell
35. 35.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a doorknob (c) a tap handle (d) a spoon lifting a lid
36. 36.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
37. 37.True or false: a spoon lifting a lid is a lever. (a) False (b) True
38. 38.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
39. 39.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
40. 40.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley

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