Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 818 · 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: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a mirror (c) an empty thread reel (d) coins as the load
3. 3.⚖️ 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 change it (c) we measure it
4. 4.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a slide (c) a spoon lifting a lid (d) a doorknob
5. 5.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) nail (d) battery
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a magnet (c) a small paper cup (d) coins as the load
7. 7.True or false: a well pulley is a wheel and axle. (a) True (b) False
8. 8.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
9. 9.⚖️ 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
10. 10.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) an empty thread reel (d) yeast
12. 12.True or false: a sloping road uses a pulley. (a) True (b) False
13. 13.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we keep it the same (c) we measure it
15. 15.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a tap handle (c) a slide (d) a well pulley
16. 16.⚖️ 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 cup of coins (b) the same string (c) number of pulleys (d) the lifting height
17. 17.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 40 cm (d) 5 cm
18. 18.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
19. 19.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
20. 20.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) easier (d) impossible
21. 21.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) a pencil (c) string (d) an empty thread reel
23. 23.⚙️ Which of these is a lever? (a) a ramp (b) a sloping road (c) a see-saw (d) a well pulley
24. 24.True or false: a steering wheel uses a pulley. (a) False (b) True
25. 25.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
26. 26.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) sideways (d) down
27. 27.True or false: a crane uses a pulley. (a) True (b) False
28. 28.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
29. 29.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a balloon (c) string (d) an empty thread reel
31. 31.⚖️ 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) number of pulleys (c) the same cup of coins
32. 32.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) water gets lighter (c) the bucket floats (d) the rope gets shorter
33. 33.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) the same (d) zero
34. 34.⚖️ 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
35. 35.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a flagpole (c) a spoon lifting a lid (d) a crowbar
36. 36.⚙️ Which of these is a lever? (a) a flagpole (b) a crane (c) a spoon lifting a lid (d) a sloping road
37. 37.⚖️ 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 measure it (c) we keep it the same
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) an empty thread reel (d) a small paper cup
39. 39.⚖️ 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) the same string (c) how hard we must pull
40. 40.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed

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