Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 314 · 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.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
2. 2.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
3. 3.🇮🇳 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
4. 4.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a balloon (c) string (d) coins as the load
6. 6.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
7. 7.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it gets wet (d) it can hurt your finger
8. 8.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) impossible (d) the same
9. 9.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
10. 10.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a tap handle (c) a bottle opener (d) a slide
11. 11.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
12. 12.⚖️ 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 keep it the same (c) we measure it
13. 13.⚖️ 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) False (b) True
14. 14.⚖️ 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 change it (b) we keep it the same (c) we measure it
15. 15.🧺 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) yeast
16. 16.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it gets hot (d) it might sing
17. 17.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) in a circle (d) up
18. 18.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) number of pulleys (c) the same cup of coins (d) the same string
20. 20.⚖️ 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
21. 21.True or false: a steering wheel is a wheel and axle. (a) False (b) True
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a mirror (c) a balloon (d) a battery cell
23. 23.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
24. 24.True or false: a bottle opener is a lever. (a) True (b) False
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) coins as the load (c) an empty thread reel (d) string
26. 26.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a ramp (c) a crane (d) a tap handle
27. 27.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
28. 28.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) an empty thread reel (c) a magnet (d) a mirror
30. 30.True or false: a doorknob is an inclined plane. (a) True (b) False
31. 31.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
32. 32.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
33. 33.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) nail (d) battery
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
35. 35.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) water gets lighter (d) pulling down is easier
36. 36.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
37. 37.⚙️ Which of these is a lever? (a) a steering wheel (b) a flagpole (c) a well pulley (d) a crowbar
38. 38.True or false: a well pulley is a wheel and axle. (a) False (b) True
39. 39.True or false: a well pulley uses a pulley. (a) True (b) False
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) turmeric powder (d) string

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