Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 305 · 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.⚖️ 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
2. 2.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
3. 3.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) string (d) a battery cell
5. 5.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a balloon (c) string (d) a small paper cup
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) string (d) coins as the load
7. 7.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) up (d) sideways
8. 8.⚖️ 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 keep it the same (b) we measure it (c) we change it
9. 9.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it might sing (d) it gets hot
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) coins as the load (c) a small paper cup (d) string
11. 11.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
12. 12.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
13. 13.⚖️ 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) the same cup of coins (c) number of pulleys
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) a pencil (d) turmeric powder
15. 15.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
16. 16.True or false: a flagpole uses a pulley. (a) False (b) True
17. 17.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
18. 18.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
19. 19.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) in the tap (d) on the bench
20. 20.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
21. 21.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
22. 22.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
23. 23.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
24. 24.⚖️ 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
25. 25.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) water gets lighter (d) pulling down is easier
26. 26.⚖️ 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) number of pulleys (c) the same string (d) how hard we must pull
27. 27.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
28. 28.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
29. 29.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
30. 30.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
31. 31.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) impossible (d) easier
32. 32.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
33. 33.⚖️ 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
34. 34.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
35. 35.⚖️ 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
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) a magnet (d) a small paper cup
37. 37.True or false: a crane is a lever. (a) True (b) False
38. 38.⚙️ Which of these uses a pulley? (a) a ramp (b) a spoon lifting a lid (c) a see-saw (d) a crane
39. 39.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
40. 40.⚖️ 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) False (b) True

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