Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 472 · 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.🏗️ 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
2. 2.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
3. 3.⚖️ 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 change it (c) we keep it the same
4. 4.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we keep it the same (c) we measure it
6. 6.True or false: a tap handle is a wheel and axle. (a) True (b) False
7. 7.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
8. 8.⚙️ Which of these is a wheel and axle? (a) a slide (b) a tap handle (c) a spoon lifting a lid (d) a bottle opener
9. 9.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
10. 10.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it gets hot (d) it is magnetic
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a magnet (d) a small paper cup
13. 13.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
14. 14.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
15. 15.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a small paper cup (d) a battery cell
17. 17.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) an empty thread reel (c) string (d) coins as the load
19. 19.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a pencil (c) a balloon (d) yeast
21. 21.⚖️ 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 string (c) number of pulleys
22. 22.⚖️ 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 measure it (b) we keep it the same (c) we change it
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the lifting height (c) the same string (d) how hard we must pull
24. 24.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) the same (d) harder
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) True (b) False
26. 26.🔮 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
27. 27.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
28. 28.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
29. 29.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a flagpole (c) a sloping road (d) a crowbar
30. 30.⚖️ 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) number of pulleys (d) the same cup of coins
31. 31.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
32. 32.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) yeast (d) string
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) a small paper cup (d) turmeric powder
35. 35.True or false: a crane is a lever. (a) False (b) True
36. 36.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) magnet (d) nail
37. 37.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) in the tap (d) on the bench
38. 38.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
40. 40.True or false: a slide is a wheel and axle. (a) False (b) True

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