Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 948 · 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.True or false: a see-saw is a lever. (a) False (b) True
2. 2.🧺 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 balloon (d) a pencil
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the same string (c) the lifting height (d) the same cup of coins
4. 4.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a battery cell (c) a balloon (d) a magnet
6. 6.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
7. 7.⚙️ Which of these is an inclined plane? (a) a crane (b) a steering wheel (c) a see-saw (d) a ramp
8. 8.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
9. 9.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 10 cm (d) 5 cm
10. 10.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
11. 11.🛟 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
12. 12.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
13. 13.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) a pencil (d) an empty thread reel
15. 15.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
16. 16.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) pulling down is easier (d) water gets lighter
17. 17.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
18. 18.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) in the tap (c) on the blackboard (d) on the bench
19. 19.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
20. 20.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) an empty thread reel (d) turmeric powder
22. 22.True or false: a well pulley is a wheel and axle. (a) True (b) False
23. 23.⚖️ 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 keep it the same (c) we change it
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) string (c) a magnet (d) yeast
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) a magnet (d) coins as the load
26. 26.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
27. 27.⚙️ Which of these is a lever? (a) a see-saw (b) a flagpole (c) a tap handle (d) a well pulley
28. 28.⚖️ 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
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a mirror (c) a balloon (d) turmeric powder
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) a small paper cup (c) a pencil (d) an empty thread reel
31. 31.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
32. 32.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a tap handle (c) a see-saw (d) a spoon lifting a lid
33. 33.True or false: a ramp is a lever. (a) False (b) True
34. 34.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) easier (d) harder
35. 35.True or false: a crane is a wheel and axle. (a) False (b) True
36. 36.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
37. 37.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
38. 38.True or false: a doorknob is a wheel and axle. (a) True (b) False
39. 39.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) nail (d) magnet
40. 40.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) adds weight (d) changes pull direction

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