Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 142 · 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.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) impossible (d) the same
2. 2.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it is magnetic (d) it could fall on you
3. 3.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
4. 4.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
5. 5.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
6. 6.True or false: a flagpole uses a pulley. (a) True (b) False
7. 7.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a sloping road (c) a ramp (d) a steering wheel
8. 8.🛟 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
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) double (d) the same
10. 10.True or false: a sloping road is an inclined plane. (a) True (b) False
11. 11.⚖️ 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
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) a pencil (d) yeast
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 tap handle is a lever. (a) True (b) False
15. 15.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the flagpole (c) on the blackboard (d) on the bench
16. 16.True or false: a steering wheel is a lever. (a) False (b) True
17. 17.⚖️ 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 measure it (c) we keep it the same
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) an empty thread reel (c) yeast (d) a battery cell
19. 19.⚖️ 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 cup of coins (c) number of pulleys
20. 20.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
21. 21.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
22. 22.True or false: a sloping road is a lever. (a) True (b) False
23. 23.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
24. 24.⚖️ 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 measure it (c) we change it
25. 25.True or false: a doorknob is an inclined plane. (a) False (b) True
26. 26.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
27. 27.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
28. 28.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
29. 29.⚖️ 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) the same cup of coins (c) how hard we must pull (d) the lifting height
30. 30.⚖️ 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) True (b) False
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a magnet (c) an empty thread reel (d) coins as the load
32. 32.⚖️ 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
33. 33.True or false: a bottle opener is a lever. (a) False (b) True
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) coins as the load (d) yeast
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) a battery cell (d) a small paper cup
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) a balloon (d) an empty thread reel
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a balloon (d) a pencil
38. 38.⚙️ Which of these is an inclined plane? (a) a slide (b) a doorknob (c) a bottle opener (d) a tap handle
39. 39.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
40. 40.True or false: a crane is a lever. (a) True (b) False

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