Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 135 · 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.⚙️ Which of these is a wheel and axle? (a) a crane (b) a well pulley (c) a doorknob (d) a see-saw
2. 2.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
3. 3.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets wet (d) it gets longer
4. 4.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 20 cm (d) 10 cm
5. 5.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a spoon lifting a lid (c) a tap handle (d) a crowbar
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) an empty thread reel (d) a magnet
7. 7.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the blackboard (c) on the flagpole (d) on the bench
8. 8.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
9. 9.⚖️ 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 cup of coins (b) the same string (c) how hard we must pull (d) number of pulleys
10. 10.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) zero (d) double
11. 11.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) down (d) sideways
12. 12.⚖️ 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
13. 13.⚖️ 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
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) an empty thread reel (d) a battery cell
15. 15.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
16. 16.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
17. 17.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
18. 18.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
19. 19.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a crane (c) a doorknob (d) a ramp
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a mirror (c) a battery cell (d) coins as the load
21. 21.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a flagpole (c) a spoon lifting a lid (d) a steering wheel
22. 22.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
23. 23.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) a pencil (d) a battery cell
25. 25.⚙️ Which simple machine is a doorknob? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
26. 26.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
27. 27.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
28. 28.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
29. 29.⚙️ Which of these is a lever? (a) a crane (b) a bottle opener (c) a flagpole (d) a tap handle
30. 30.True or false: a flagpole is a wheel and axle. (a) True (b) False
31. 31.True or false: a slide uses a pulley. (a) True (b) False
32. 32.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) water gets lighter (c) the bucket floats (d) the rope gets shorter
33. 33.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
34. 34.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) False (b) True
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) how hard we must pull (c) the lifting height (d) number of pulleys
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
38. 38.⚙️ Which of these uses a pulley? (a) a crowbar (b) a bottle opener (c) a slide (d) a flagpole
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
40. 40.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed

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