Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 191 · 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) an empty thread reel (b) a battery cell (c) turmeric powder (d) a balloon
2. 2.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) yeast (c) string (d) coins as the load
4. 4.⚖️ 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
5. 5.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) about half (d) the same
6. 6.⚖️ 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
7. 7.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) the rope gets shorter (d) pulling down is easier
8. 8.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
9. 9.True or false: a doorknob is a lever. (a) True (b) False
10. 10.⚖️ 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 measure it (b) we change it (c) we keep it the same
11. 11.⚖️ 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
12. 12.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
13. 13.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) number of pulleys (c) how hard we must pull
15. 15.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
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 string (b) how hard we must pull (c) the same cup of coins (d) number of pulleys
17. 17.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) in a circle (d) sideways
18. 18.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) harder (d) easier
19. 19.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
20. 20.⚖️ 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 keep it the same (c) we measure it
21. 21.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
22. 22.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) a balloon (d) coins as the load
24. 24.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
25. 25.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
26. 26.True or false: a flagpole is a wheel and axle. (a) True (b) False
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) string (d) turmeric powder
28. 28.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
29. 29.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
30. 30.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
31. 31.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it gets hot (d) it might sing
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) turmeric powder (c) an empty thread reel (d) coins as the load
33. 33.⚖️ 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
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) yeast (c) coins as the load (d) string
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) how hard we must pull (c) the same cup of coins (d) the lifting height
36. 36.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
37. 37.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) rope (d) magnet
38. 38.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a mirror (c) an empty thread reel (d) a pencil
40. 40.⚙️ Which of these is an inclined plane? (a) a ramp (b) a crowbar (c) a see-saw (d) a steering wheel

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