Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 682 · 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 same string”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.⚖️ 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) the same cup of coins (c) number of pulleys (d) the lifting height
3. 3.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it can hurt your finger (d) it turns blue
4. 4.True or false: a crane is an inclined plane. (a) False (b) True
5. 5.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) string (c) a small paper cup (d) an empty thread reel
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) False (b) True
7. 7.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
8. 8.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
9. 9.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) a pencil (d) turmeric powder
11. 11.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
12. 12.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) string (d) yeast
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a small paper cup (d) a balloon
15. 15.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a tap handle (c) a bottle opener (d) a spoon lifting a lid
16. 16.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) a balloon (d) coins as the load
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 same string (c) how hard we must pull (d) the lifting height
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a mirror (c) an empty thread reel (d) a pencil
21. 21.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a battery cell (d) string
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a battery cell (c) a magnet (d) turmeric powder
24. 24.⚖️ 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
25. 25.True or false: string is needed for the thread-reel pulley. (a) False (b) True
26. 26.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
27. 27.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
28. 28.⚖️ 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 same cup of coins
29. 29.True or false: a flagpole is a wheel and axle. (a) False (b) True
30. 30.True or false: a steering wheel uses a pulley. (a) True (b) False
31. 31.True or false: a ramp is a lever. (a) False (b) True
32. 32.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
33. 33.⚙️ Which of these is a lever? (a) a bottle opener (b) a sloping road (c) a well pulley (d) a flagpole
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) string (c) coins as the load (d) a small paper cup
35. 35.⚙️ Which of these uses a pulley? (a) a sloping road (b) a see-saw (c) a flagpole (d) a doorknob
36. 36.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
37. 37.⚙️ Which simple machine is a crane? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
38. 38.⚖️ 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 keep it the same (b) we change it (c) we measure it
39. 39.True or false: a tap handle is an inclined plane. (a) True (b) False
40. 40.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it might sing (d) it is magnetic

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