Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 970 · 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.True or false: a crane is a lever. (a) True (b) False
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
3. 3.⚙️ Which simple machine is a sloping road? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
4. 4.⚖️ 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
5. 5.True or false: a well pulley uses a pulley. (a) True (b) False
6. 6.⚖️ 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 change it (c) we keep it the same
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) string (c) yeast (d) a magnet
8. 8.⚙️ Which of these uses a pulley? (a) a see-saw (b) a tap handle (c) a well pulley (d) a slide
9. 9.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a tap handle (c) a flagpole (d) a crane
10. 10.True or false: a well pulley is a wheel and axle. (a) False (b) True
11. 11.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
12. 12.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it might sing (d) it gets hot
13. 13.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
14. 14.⚙️ Which of these is a lever? (a) a flagpole (b) a spoon lifting a lid (c) a sloping road (d) a tap handle
15. 15.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a small paper cup (c) an empty thread reel (d) string
17. 17.⚖️ 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) True (b) False
18. 18.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) down (d) in a circle
19. 19.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
20. 20.⚖️ 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 string (c) the lifting height (d) number of pulleys
21. 21.⚖️ 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
22. 22.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) the same (d) impossible
23. 23.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a slide (c) a steering wheel (d) a flagpole
24. 24.True or false: a ramp is an inclined plane. (a) False (b) True
25. 25.True or false: a ramp is a wheel and axle. (a) True (b) False
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) a small paper cup (d) yeast
27. 27.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
28. 28.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) nail (d) battery
29. 29.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 5 cm (d) 40 cm
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) a mirror (d) coins as the load
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a battery cell (c) string (d) a pencil
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins (d) the same string
34. 34.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a mirror (c) string (d) a small paper cup
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
37. 37.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a small paper cup (c) a pencil (d) string
39. 39.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a small paper cup (c) yeast (d) a mirror

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