Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 864 · 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) an empty thread reel (b) string (c) a small paper cup (d) a magnet
2. 2.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a sloping road (c) a tap handle (d) a crowbar
3. 3.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
4. 4.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
5. 5.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) easier (d) impossible
6. 6.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
7. 7.⚖️ 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
8. 8.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
9. 9.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
10. 10.⚖️ 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
11. 11.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
12. 12.⚖️ 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 keep it the same (b) we measure it (c) we change it
13. 13.True or false: a doorknob is an inclined plane. (a) True (b) False
14. 14.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
15. 15.True or false: a well pulley is an inclined plane. (a) False (b) True
16. 16.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) double (d) the same
17. 17.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) coins as the load (d) yeast
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) yeast (d) a mirror
20. 20.⚖️ 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
21. 21.⚙️ Which of these uses a pulley? (a) a sloping road (b) a flagpole (c) a doorknob (d) a slide
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
23. 23.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) down (d) up
24. 24.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
25. 25.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) the lifting height (c) how hard we must pull (d) the same string
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) a pencil (d) turmeric powder
28. 28.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it gets hot (d) it could fall on you
29. 29.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
30. 30.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) string (d) yeast
32. 32.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
33. 33.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
35. 35.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
36. 36.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) nail (d) battery
37. 37.⚙️ Which simple machine is a well pulley? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
38. 38.⚙️ Which of these is a lever? (a) a slide (b) a crowbar (c) a ramp (d) a flagpole
39. 39.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a flagpole (c) a sloping road (d) a tap handle
40. 40.⚙️ Which of these is a lever? (a) a crane (b) a see-saw (c) a doorknob (d) a slide

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