Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 152 · 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 can hurt your finger (b) it turns blue (c) it gets longer (d) it gets wet
2. 2.⚖️ 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 measure it (c) we keep it the same
3. 3.⚖️ 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 measure it (c) we change it
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) an empty thread reel (c) string (d) a small paper cup
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) a pencil (d) a battery cell
6. 6.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) on the bench (d) in the tap
7. 7.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
8. 8.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a spoon lifting a lid (c) a doorknob (d) a sloping road
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a mirror (c) string (d) an empty thread reel
10. 10.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) down (d) sideways
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) an empty thread reel (c) turmeric powder (d) a magnet
12. 12.True or false: a ramp is a lever. (a) False (b) True
13. 13.⚖️ 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) number of pulleys
14. 14.True or false: a flagpole uses a pulley. (a) False (b) True
15. 15.True or false: a see-saw is an inclined plane. (a) True (b) False
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a small paper cup (d) a balloon
17. 17.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
18. 18.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
19. 19.⚙️ Which simple machine is a crowbar? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the lifting height
21. 21.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
22. 22.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
23. 23.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
24. 24.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
25. 25.⚖️ 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 change it (c) we keep it the same
26. 26.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
27. 27.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) coins as the load (d) a magnet
29. 29.⚖️ 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 measure it (c) we keep it the same
30. 30.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) coins as the load (d) a mirror
32. 32.⚖️ 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
33. 33.⚙️ Which of these is a lever? (a) a steering wheel (b) a ramp (c) a slide (d) a see-saw
34. 34.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
35. 35.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
36. 36.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
37. 37.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
38. 38.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
39. 39.⚖️ 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) the same string (c) how hard we must pull
40. 40.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane

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