Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 137 · 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 lifting height”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
3. 3.⚖️ 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) how hard we must pull (c) number of pulleys
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a pencil (c) a small paper cup (d) an empty thread reel
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) coins as the load (c) string (d) a pencil
6. 6.🧺 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) a pencil
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) False (b) True
8. 8.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
9. 9.⚙️ Which of these is a lever? (a) a crowbar (b) a ramp (c) a flagpole (d) a crane
10. 10.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it gets hot (d) it is magnetic
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we change it (c) we measure it
12. 12.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) down (d) in a circle
13. 13.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the lifting height (c) the same string (d) the same cup of coins
15. 15.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
16. 16.⚖️ 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 lifting height (d) the same string
17. 17.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a doorknob (c) a see-saw (d) a slide
18. 18.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
19. 19.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
20. 20.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
22. 22.⚖️ 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
23. 23.True or false: a sloping road is a wheel and axle. (a) False (b) True
24. 24.True or false: a steering wheel is a wheel and axle. (a) False (b) True
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) True (b) False
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
27. 27.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it can hurt your finger (d) it gets longer
28. 28.True or false: a well pulley uses a pulley. (a) False (b) True
29. 29.True or false: a doorknob is a wheel and axle. (a) False (b) True
30. 30.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
31. 31.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
32. 32.⚖️ 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
33. 33.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) in the tap (c) on the blackboard (d) on the bench
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a pencil (c) an empty thread reel (d) coins as the load
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) coins as the load (d) a battery cell
36. 36.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
37. 37.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a ramp (c) a crowbar (d) a well pulley
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) a mirror (d) yeast
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a battery cell (d) string
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) turmeric powder (c) an empty thread reel (d) string

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