Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 333 · 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.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) double (d) the same
2. 2.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) impossible (d) the same
3. 3.True or false: a crowbar is a lever. (a) False (b) True
4. 4.⚙️ Which simple machine is a slide? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) yeast (c) coins as the load (d) a small paper cup
6. 6.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
7. 7.True or false: a slide uses a pulley. (a) True (b) False
8. 8.⚖️ 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) how hard we must pull (c) the lifting height (d) number of pulleys
9. 9.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
10. 10.⚙️ Which of these is a lever? (a) a well pulley (b) a steering wheel (c) a crowbar (d) a doorknob
11. 11.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
12. 12.True or false: a doorknob uses a pulley. (a) False (b) True
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) a balloon (d) coins as the load
14. 14.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
15. 15.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight
16. 16.⚖️ 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
17. 17.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
18. 18.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
19. 19.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) a pencil (d) a mirror
22. 22.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) the rope gets shorter (d) water gets lighter
23. 23.True or false: a steering wheel is a wheel and axle. (a) False (b) True
24. 24.⚙️ Which of these is a lever? (a) a doorknob (b) a slide (c) a well pulley (d) a see-saw
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
26. 26.⚙️ Which of these uses a pulley? (a) a slide (b) a steering wheel (c) a flagpole (d) a crowbar
27. 27.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
28. 28.⚖️ 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
29. 29.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) magnet (d) nail
30. 30.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) in a circle (d) down
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) an empty thread reel (d) a battery cell
32. 32.True or false: string is needed for the thread-reel pulley. (a) False (b) True
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a pencil (d) a magnet
34. 34.⚖️ 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
35. 35.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the blackboard (d) on the flagpole
36. 36.🛟 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
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) number of pulleys (c) how hard we must pull (d) the lifting height
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) True (b) False
39. 39.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a crane (c) a doorknob (d) a ramp
40. 40.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed

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