Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 229 · 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.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) about half (d) the same
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) a small paper cup (d) coins as the load
3. 3.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) magnet (d) rope
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) yeast (c) a pencil (d) a small paper cup
5. 5.⚖️ 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
6. 6.⚖️ 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) number of pulleys (c) how hard we must pull (d) the lifting height
7. 7.⚙️ Which of these is a lever? (a) a steering wheel (b) a slide (c) a doorknob (d) a spoon lifting a lid
8. 8.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets longer (d) it gets wet
9. 9.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
10. 10.⚖️ 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 measure it (b) we change it (c) we keep it the same
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the lifting height (c) the same string (d) how hard we must pull
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a battery cell (d) a pencil
13. 13.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
14. 14.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
15. 15.🛟 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
16. 16.True or false: a tap handle is a lever. (a) False (b) True
17. 17.True or false: a steering wheel is a wheel and axle. (a) True (b) False
18. 18.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
19. 19.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a tap handle (c) a crane (d) a ramp
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) a pencil (d) a battery cell
21. 21.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) turmeric powder (d) coins as the load
23. 23.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
24. 24.⚖️ 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
25. 25.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a sloping road (c) a see-saw (d) a crowbar
26. 26.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
27. 27.True or false: a doorknob is a wheel and axle. (a) False (b) True
28. 28.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
29. 29.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we measure it (c) we change it
31. 31.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) sideways (d) down
32. 32.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) water gets lighter (d) pulling down is easier
33. 33.⚙️ Which of these is a lever? (a) a doorknob (b) a crowbar (c) a flagpole (d) a sloping road
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) string (d) a pencil
35. 35.⚙️ Which of these uses a pulley? (a) a crowbar (b) a spoon lifting a lid (c) a flagpole (d) a steering wheel
36. 36.⚖️ 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 same cup of coins
37. 37.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
38. 38.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
39. 39.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
40. 40.⚖️ 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

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