Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 705 · 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 a mirror for the thread-reel pulley? (a) not needed (b) needed
2. 2.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer
3. 3.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) double (d) zero
4. 4.🧺 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 battery cell (d) an empty thread reel
5. 5.⚖️ 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) False (b) True
6. 6.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
7. 7.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
8. 8.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
9. 9.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a ramp (c) a slide (d) a flagpole
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) string (c) a pencil (d) a small paper cup
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) yeast (d) an empty thread reel
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) the same cup of coins (c) number of pulleys
13. 13.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we measure it (b) we keep it the same (c) we change it
15. 15.True or false: a doorknob uses a pulley. (a) False (b) True
16. 16.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
17. 17.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) battery (c) magnet (d) nail
18. 18.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the rope gets shorter (c) the bucket floats (d) pulling down is easier
19. 19.🛟 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
20. 20.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) adds weight (c) halves the weight (d) makes it magnetic
21. 21.⚙️ Which of these uses a pulley? (a) a crane (b) a steering wheel (c) a crowbar (d) a see-saw
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) string (d) a mirror
23. 23.⚖️ 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 change it (c) we keep it the same
24. 24.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
25. 25.⚖️ 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) True (b) False
26. 26.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
27. 27.True or false: a tap handle is a wheel and axle. (a) True (b) False
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) string (c) a pencil (d) an empty thread reel
31. 31.⚙️ Which simple machine is a flagpole? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
32. 32.True or false: a see-saw is an inclined plane. (a) False (b) True
33. 33.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
34. 34.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
35. 35.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a bottle opener (c) a see-saw (d) a sloping road
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a battery cell (c) yeast (d) a balloon
37. 37.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
38. 38.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
39. 39.⚖️ 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
40. 40.⚙️ Which simple machine is a crowbar? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane

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