Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 234 · 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 change it (b) we measure it (c) we keep it the same
2. 2.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
3. 3.⚖️ 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 string (b) the same cup of coins (c) the lifting height (d) number of pulleys
4. 4.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) an empty thread reel (d) a magnet
6. 6.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
7. 7.⚙️ Which of these is an inclined plane? (a) a crane (b) a ramp (c) a spoon lifting a lid (d) a tap handle
8. 8.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) a magnet (d) coins as the load
10. 10.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
11. 11.True or false: a crowbar uses a pulley. (a) False (b) True
12. 12.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a doorknob (c) a bottle opener (d) a slide
13. 13.True or false: a ramp is an inclined plane. (a) True (b) False
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.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) pulling down is easier (d) the rope gets shorter
16. 16.⚖️ 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
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) string (d) a balloon
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) an empty thread reel (d) yeast
20. 20.True or false: a bottle opener is a lever. (a) True (b) False
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a mirror (d) a small paper cup
22. 22.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
23. 23.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) impossible (d) the same
24. 24.True or false: a slide is an inclined plane. (a) False (b) True
25. 25.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) in the tap (d) on the bench
26. 26.⚙️ Which of these is a lever? (a) a crane (b) a spoon lifting a lid (c) a sloping road (d) a slide
27. 27.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
28. 28.⚙️ Which of these is a lever? (a) a slide (b) a doorknob (c) a see-saw (d) a well pulley
29. 29.⚙️ Which of these uses a pulley? (a) a well pulley (b) a crowbar (c) a slide (d) a steering wheel
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
31. 31.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
32. 32.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
33. 33.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
34. 34.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
36. 36.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
37. 37.⚖️ 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
38. 38.⚖️ 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
39. 39.⚖️ 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) False (b) True
40. 40.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) sideways (d) up

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