Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 700 · 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.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) coins as the load (d) a mirror
2. 2.⚖️ 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
3. 3.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it gets hot (d) it is magnetic
4. 4.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it turns blue (d) it gets wet
5. 5.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) coins as the load (d) a magnet
7. 7.True or false: a doorknob is a lever. (a) True (b) False
8. 8.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
9. 9.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
10. 10.True or false: a doorknob is an inclined plane. (a) False (b) True
11. 11.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 10 cm (d) 5 cm
12. 12.⚖️ 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) True (b) False
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) a magnet (d) a mirror
14. 14.⚖️ 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 keep it the same (c) we change it
15. 15.⚖️ 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) how hard we must pull (c) the lifting height
16. 16.⚙️ Which of these is a lever? (a) a crane (b) a flagpole (c) a bottle opener (d) a slide
17. 17.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) double (d) the same
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) yeast (c) string (d) a mirror
19. 19.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) nail (d) battery
20. 20.⚖️ 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
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a balloon (c) a battery cell (d) yeast
22. 22.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) yeast (c) a magnet (d) a pencil
24. 24.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
25. 25.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a sloping road (c) a well pulley (d) a tap handle
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a pencil (d) turmeric powder
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) the lifting height (d) number of pulleys
28. 28.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
29. 29.True or false: a crane is a lever. (a) False (b) True
30. 30.True or false: a bottle opener uses a pulley. (a) True (b) False
31. 31.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
32. 32.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a mirror (c) a small paper cup (d) coins as the load
35. 35.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) in a circle (d) sideways
36. 36.True or false: a flagpole uses a pulley. (a) False (b) True
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 keep it the same (c) we measure it
38. 38.True or false: a crane is an inclined plane. (a) False (b) True
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) yeast (d) string
40. 40.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane

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