Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 657 · 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: yeast is needed for the thread-reel pulley. (a) False (b) True
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) turmeric powder (c) a pencil (d) string
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) turmeric powder (d) a mirror
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) coins as the load (d) yeast
5. 5.⚖️ 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
6. 6.⚖️ 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 keep it the same (c) we measure it
7. 7.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
8. 8.⚖️ 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
9. 9.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True
11. 11.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
12. 12.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
14. 14.True or false: a crane is a wheel and axle. (a) True (b) False
15. 15.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
16. 16.⚙️ Which simple machine is a flagpole? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
17. 17.⚖️ 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 change it (b) we keep it the same (c) we measure it
18. 18.⚖️ 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 string (c) number of pulleys
19. 19.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it could fall on you (d) it gets hot
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
21. 21.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a steering wheel (c) a well pulley (d) a crane
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) number of pulleys (c) the same cup of coins (d) the same string
23. 23.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
24. 24.True or false: a bottle opener uses a pulley. (a) False (b) True
25. 25.⚙️ Which of these uses a pulley? (a) a flagpole (b) a slide (c) a crowbar (d) a see-saw
26. 26.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) pulling down is easier (d) the bucket floats
27. 27.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
28. 28.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
29. 29.True or false: a bottle opener is a lever. (a) False (b) True
30. 30.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a pencil (c) a magnet (d) a balloon
33. 33.⚙️ Which of these is a lever? (a) a crane (b) a spoon lifting a lid (c) a flagpole (d) a ramp
34. 34.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a magnet (c) coins as the load (d) an empty thread reel
36. 36.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
37. 37.True or false: a well pulley is a lever. (a) True (b) False
38. 38.⚖️ 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
39. 39.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a crane (c) a ramp (d) a spoon lifting a lid
40. 40.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane

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