Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 304 · 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.⚖️ 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
2. 2.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
3. 3.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 40 cm (d) 20 cm
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.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
6. 6.🛟 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
7. 7.True or false: a spoon lifting a lid is a lever. (a) False (b) True
8. 8.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
9. 9.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
10. 10.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
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) a small paper cup (d) a mirror
12. 12.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
13. 13.⚖️ 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
14. 14.⚖️ 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
15. 15.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
16. 16.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) easier (d) impossible
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) number of pulleys (c) how hard we must pull
18. 18.True or false: a doorknob is an inclined plane. (a) False (b) True
19. 19.⚖️ 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) number of pulleys
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) False (b) True
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) True (b) False
23. 23.🧺 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) a magnet
24. 24.True or false: a well pulley uses a pulley. (a) False (b) True
25. 25.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
26. 26.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) the same (d) zero
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) turmeric powder (d) a small paper cup
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a mirror (c) coins as the load (d) a battery cell
29. 29.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
30. 30.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a crowbar (c) a see-saw (d) a slide
31. 31.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
32. 32.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
33. 33.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a see-saw (c) a crowbar (d) a crane
34. 34.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
35. 35.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
36. 36.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
37. 37.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
38. 38.⚙️ Which of these uses a pulley? (a) a see-saw (b) a bottle opener (c) a spoon lifting a lid (d) a well pulley
39. 39.⚖️ 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 string (b) number of pulleys (c) how hard we must pull (d) the same cup of coins
40. 40.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True

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