Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 385 · 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) the same (b) about half (c) zero (d) double
2. 2.⚙️ Which of these uses a pulley? (a) a slide (b) a flagpole (c) a tap handle (d) a doorknob
3. 3.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
4. 4.⚖️ 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) how hard we must pull (c) the lifting height
5. 5.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
6. 6.⚖️ 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 keep it the same (c) we change it
7. 7.⚖️ 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) the same cup of coins (c) the same string (d) how hard we must pull
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) string (c) coins as the load (d) an empty thread reel
9. 9.⚖️ 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
10. 10.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
11. 11.True or false: string 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 same cup of coins”? (a) we measure it (b) we keep it the same (c) we change it
13. 13.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the rope gets shorter (c) the bucket floats (d) pulling down is easier
14. 14.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a tap handle (c) a crowbar (d) a see-saw
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? Which of these is the one thing we change? (a) the lifting height (b) the same string (c) number of pulleys (d) the same cup of coins
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.True or false: a spoon lifting a lid is a lever. (a) True (b) False
19. 19.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
20. 20.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
22. 22.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) False (b) True
24. 24.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a small paper cup (d) a magnet
26. 26.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a small paper cup (d) a battery cell
28. 28.True or false: a doorknob is a wheel and axle. (a) True (b) False
29. 29.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) rope (d) battery
30. 30.True or false: a bottle opener is a lever. (a) False (b) True
31. 31.True or false: a flagpole is an inclined plane. (a) False (b) True
32. 32.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the bench (c) on the blackboard (d) on the flagpole
33. 33.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) makes it magnetic (c) adds weight (d) halves the weight
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) turmeric powder (d) a pencil
35. 35.True or false: a ramp is an inclined plane. (a) True (b) False
36. 36.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
37. 37.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
38. 38.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
39. 39.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
40. 40.True or false: a tap handle is an inclined plane. (a) True (b) False

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