Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 323 · 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.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) in a circle (d) sideways
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) a balloon (d) a battery cell
3. 3.⚙️ Which simple machine is a crowbar? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
4. 4.⚙️ Which simple machine is a ramp? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) a balloon (d) coins as the load
6. 6.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) pulling down is easier (d) the rope gets shorter
7. 7.🛟 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
8. 8.🧺 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 mirror (d) a small paper cup
9. 9.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
10. 10.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
11. 11.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
12. 12.⚖️ 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
13. 13.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
14. 14.⚙️ Which of these uses a pulley? (a) a see-saw (b) a spoon lifting a lid (c) a slide (d) a well pulley
15. 15.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
16. 16.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a steering wheel (c) a doorknob (d) a crane
17. 17.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
18. 18.⚖️ 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) the lifting height (c) number of pulleys (d) how hard we must pull
19. 19.True or false: a see-saw is a wheel and axle. (a) False (b) True
20. 20.⚖️ 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 keep it the same (b) we measure it (c) we change it
21. 21.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
22. 22.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) adds weight (d) makes it magnetic
23. 23.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
24. 24.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it could fall on you (d) it is magnetic
25. 25.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
26. 26.⚙️ Which simple machine is a tap handle? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
27. 27.⚖️ 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
28. 28.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
29. 29.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
30. 30.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
31. 31.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
32. 32.⚖️ 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
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) turmeric powder (c) a small paper cup (d) an empty thread reel
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) an empty thread reel (d) yeast
35. 35.⚙️ Which of these is a lever? (a) a bottle opener (b) a flagpole (c) a doorknob (d) a steering wheel
36. 36.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the flagpole (c) on the blackboard (d) in the tap
37. 37.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
38. 38.⚖️ 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 same cup of coins
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a mirror (c) an empty thread reel (d) a pencil
40. 40.🔮 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

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