Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 685 · 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.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it can hurt your finger (d) it turns blue
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) an empty thread reel (c) a small paper cup (d) coins as the load
3. 3.⚖️ 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 measure it (b) we keep it the same (c) we change it
4. 4.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
5. 5.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
6. 6.⚖️ 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
7. 7.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it could fall on you (d) it gets hot
8. 8.🧺 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) coins as the load
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we keep it the same (c) we measure it
10. 10.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a slide (c) a tap handle (d) a bottle opener
11. 11.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) in the tap (d) on the flagpole
12. 12.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) impossible (d) the same
13. 13.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
14. 14.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) makes it magnetic (d) changes pull direction
15. 15.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
17. 17.⚙️ Which simple machine is a flagpole? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
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) number of pulleys (b) the same string (c) the same cup of coins (d) the lifting height
19. 19.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
20. 20.🧺 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 mirror
21. 21.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a magnet (d) a pencil
23. 23.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
24. 24.⚖️ 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
25. 25.⚖️ 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
26. 26.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) sideways (d) in a circle
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a pencil (d) a balloon
28. 28.True or false: a slide is an inclined plane. (a) True (b) False
29. 29.⚖️ 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
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) coins as the load (d) turmeric powder
31. 31.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the bucket floats (d) the rope gets shorter
32. 32.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a spoon lifting a lid (c) a well pulley (d) a slide
33. 33.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) magnet (d) rope
34. 34.True or false: a crane uses a pulley. (a) False (b) True
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a balloon (c) a pencil (d) turmeric powder
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a small paper cup (c) a balloon (d) a magnet
37. 37.True or false: a ramp is a lever. (a) False (b) True
38. 38.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
39. 39.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a steering wheel (c) a crowbar (d) a crane
40. 40.⚙️ Which of these is a lever? (a) a steering wheel (b) a tap handle (c) a slide (d) a spoon lifting a lid

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