Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 622 · 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 simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
2. 2.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
3. 3.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) up (d) sideways
4. 4.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) string (c) an empty thread reel (d) a pencil
6. 6.⚙️ Which of these uses a pulley? (a) a flagpole (b) a bottle opener (c) a steering wheel (d) a doorknob
7. 7.⚖️ 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
8. 8.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) on the bench (d) in the tap
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a pencil (d) yeast
10. 10.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
11. 11.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
12. 12.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 40 cm (d) 20 cm
13. 13.⚖️ 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) True (b) False
14. 14.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
15. 15.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) turmeric powder (c) coins as the load (d) an empty thread reel
17. 17.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
18. 18.🧺 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 small paper cup (d) a balloon
19. 19.⚖️ 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 measure it (c) we keep it the same
20. 20.True or false: a crowbar uses a pulley. (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) number of pulleys (b) the same cup of coins (c) how hard we must pull
22. 22.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
23. 23.⚖️ 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 lifting height (c) number of pulleys (d) the same cup of coins
24. 24.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet
25. 25.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
26. 26.⚖️ 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) False (b) True
27. 27.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we keep it the same (c) we change it
29. 29.⚙️ Which of these is a lever? (a) a crowbar (b) a tap handle (c) a steering wheel (d) a ramp
30. 30.True or false: a slide uses a pulley. (a) False (b) True
31. 31.⚖️ 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) False (b) True
32. 32.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
33. 33.True or false: a ramp is a wheel and axle. (a) True (b) False
34. 34.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) False (b) True
36. 36.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
37. 37.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) makes it magnetic (d) changes pull direction
38. 38.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
39. 39.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) harder (d) easier
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a balloon (c) turmeric powder (d) yeast

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