Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 514 · 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.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
2. 2.⚙️ Which of these is a lever? (a) a slide (b) a tap handle (c) a steering wheel (d) a spoon lifting a lid
3. 3.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
4. 4.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a flagpole (c) a crowbar (d) a see-saw
5. 5.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) adds weight (d) makes it magnetic
6. 6.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
7. 7.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
8. 8.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
9. 9.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
10. 10.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
11. 11.⚖️ 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
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) yeast (c) a magnet (d) a battery cell
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) coins as the load (c) an empty thread reel (d) a pencil
14. 14.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) a small paper cup (d) coins as the load
16. 16.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) impossible (d) easier
17. 17.⚖️ 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
18. 18.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) in a circle (d) down
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) how hard we must pull (c) number of pulleys (d) the same string
20. 20.🧺 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 pencil (d) coins as the load
21. 21.⚙️ Which of these is a lever? (a) a well pulley (b) a steering wheel (c) a see-saw (d) a ramp
22. 22.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
23. 23.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
24. 24.🏗️ 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
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a battery cell (c) coins as the load (d) an empty thread reel
26. 26.True or false: a sloping road is an inclined plane. (a) False (b) True
27. 27.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) a balloon (d) a small paper cup
29. 29.True or false: a crane uses a pulley. (a) False (b) True
30. 30.⚖️ 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
31. 31.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
32. 32.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
33. 33.True or false: a ramp is a lever. (a) True (b) False
34. 34.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
35. 35.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) an empty thread reel (d) coins as the load
37. 37.True or false: a doorknob uses a pulley. (a) False (b) True
38. 38.True or false: a steering wheel is a wheel and axle. (a) True (b) False
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the same cup of coins (c) the lifting height (d) number of pulleys
40. 40.⚖️ 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 keep it the same (c) we measure it

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