Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 482 · 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.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the bench (c) in the tap (d) on the blackboard
2. 2.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
3. 3.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a small paper cup (d) a mirror
5. 5.⚖️ 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 same cup of coins (c) the lifting height (d) number of pulleys
6. 6.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
7. 7.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a sloping road (c) a bottle opener (d) a steering wheel
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a balloon (c) coins as the load (d) a pencil
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) string (d) a pencil
10. 10.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) string (d) yeast
11. 11.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
12. 12.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
13. 13.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a tap handle (c) a ramp (d) a crane
14. 14.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
15. 15.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it turns blue (d) it gets wet
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) the same string (c) how hard we must pull (d) the same cup of coins
17. 17.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a doorknob (c) a see-saw (d) a slide
18. 18.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) pulling down is easier (d) water gets lighter
19. 19.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) yeast (d) coins as the load
21. 21.⚖️ 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
22. 22.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
23. 23.⚖️ 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 change it (c) we keep it the same
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) a small paper cup (d) a battery cell
25. 25.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) magnet (d) battery
26. 26.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it could fall on you (d) it is magnetic
27. 27.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a spoon lifting a lid (c) a well pulley (d) a crowbar
28. 28.True or false: a crowbar is an inclined plane. (a) True (b) False
29. 29.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
30. 30.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
31. 31.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
32. 32.⚖️ 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
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) a mirror (d) a pencil
34. 34.True or false: a bottle opener is a lever. (a) True (b) False
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a pencil (d) turmeric powder
36. 36.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
37. 37.⚖️ 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) True (b) False
38. 38.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
39. 39.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
40. 40.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False

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