Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 839 · 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 a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
2. 2.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 40 cm (d) 10 cm
3. 3.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it gets hot (d) it could fall on you
4. 4.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
5. 5.True or false: a steering wheel is an inclined plane. (a) True (b) False
6. 6.True or false: a ramp is a lever. (a) False (b) True
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) a pencil (d) coins as the load
8. 8.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) down (d) up
9. 9.True or false: a sloping road is a lever. (a) True (b) False
10. 10.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
11. 11.True or false: a slide is an inclined plane. (a) True (b) False
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a pencil (c) turmeric powder (d) a balloon
13. 13.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
14. 14.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) on the flagpole (d) in the tap
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a mirror (c) a balloon (d) an empty thread reel
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) turmeric powder (c) a small paper cup (d) an empty thread reel
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
18. 18.⚖️ 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 cup of coins (b) number of pulleys (c) the lifting height (d) the same string
19. 19.⚖️ 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 measure it (c) we keep it the same
20. 20.🧺 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) yeast (d) a pencil
21. 21.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) harder (d) easier
22. 22.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
23. 23.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
24. 24.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
25. 25.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a well pulley (c) a crowbar (d) a flagpole
26. 26.⚖️ 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
27. 27.⚖️ 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 keep it the same (b) we measure it (c) we change it
28. 28.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
29. 29.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
30. 30.True or false: a steering wheel uses a pulley. (a) False (b) True
31. 31.True or false: a ramp is a wheel and axle. (a) True (b) False
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a magnet (c) a balloon (d) a battery cell
33. 33.⚙️ Which simple machine is a sloping road? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
34. 34.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it gets longer (d) it turns blue
35. 35.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
36. 36.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
37. 37.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
38. 38.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) halves the weight (d) makes it magnetic
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a magnet (c) a mirror (d) turmeric powder
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the same cup of coins (c) number of pulleys (d) the lifting height

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