Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 315 · 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) impossible (b) harder (c) the same (d) easier
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 change it (b) we measure it (c) we keep it the same
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) a small paper cup (d) coins as the load
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) an empty thread reel (d) a magnet
5. 5.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
6. 6.⚖️ 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) number of pulleys
7. 7.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
8. 8.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) a mirror (d) string
10. 10.⚙️ Which of these is a lever? (a) a crane (b) a bottle opener (c) a slide (d) a ramp
11. 11.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
12. 12.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it is magnetic (d) it might sing
13. 13.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
14. 14.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
15. 15.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets longer (d) it gets wet
16. 16.⚖️ 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 change it (c) we keep it the same
17. 17.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
18. 18.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) down (d) up
19. 19.🧺 Do we need yeast 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? True or false: the lifting height is what we measure. (a) False (b) True
21. 21.⚖️ 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
22. 22.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
23. 23.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) coins as the load (d) a battery cell
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) yeast (c) an empty thread reel (d) a pencil
26. 26.⚙️ Which of these uses a pulley? (a) a flagpole (b) a slide (c) a doorknob (d) a tap handle
27. 27.True or false: a ramp is an inclined plane. (a) False (b) True
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a mirror (d) a pencil
29. 29.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
30. 30.True or false: a steering wheel uses a pulley. (a) False (b) True
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) yeast (d) a battery cell
32. 32.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
33. 33.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) turmeric powder (d) string
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) string (d) a small paper cup
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) an empty thread reel (c) coins as the load (d) a pencil
37. 37.⚙️ Which of these uses a pulley? (a) a sloping road (b) a tap handle (c) a spoon lifting a lid (d) a crane
38. 38.⚖️ 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
39. 39.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
40. 40.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) in the tap (c) on the bench (d) on the blackboard

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