Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 476 · 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 balloon (b) an empty thread reel (c) string (d) a pencil
2. 2.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the bucket floats (d) the rope gets shorter
3. 3.⚖️ 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
4. 4.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
5. 5.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
6. 6.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it gets wet (d) it turns blue
7. 7.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
8. 8.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a bottle opener (c) a well pulley (d) a tap handle
9. 9.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) down (d) sideways
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.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we keep it the same (c) we change it
12. 12.⚙️ Which of these is a lever? (a) a doorknob (b) a crane (c) a tap handle (d) a crowbar
13. 13.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
14. 14.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a battery cell (c) a mirror (d) turmeric powder
16. 16.⚖️ 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
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) an empty thread reel (d) a small paper cup
18. 18.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
19. 19.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
20. 20.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
21. 21.⚖️ 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
22. 22.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
23. 23.⚖️ 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) True (b) False
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same cup of coins”? (a) we change it (b) we measure it (c) we keep it the same
25. 25.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) an empty thread reel (d) yeast
27. 27.🧺 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 small paper cup (d) string
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.True or false: a crowbar is an inclined plane. (a) False (b) True
30. 30.True or false: a well pulley uses a pulley. (a) False (b) True
31. 31.⚖️ 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) True (b) False
32. 32.True or false: a spoon lifting a lid is a lever. (a) True (b) False
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 measure it (c) we change it
34. 34.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
35. 35.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) in the tap (c) on the bench (d) on the blackboard
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
37. 37.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a well pulley (c) a bottle opener (d) a tap handle
38. 38.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) the same (d) impossible
39. 39.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
40. 40.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False

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