Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 353 · 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 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
2. 2.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
3. 3.⚖️ 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 measure it (c) we keep it the same
4. 4.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
5. 5.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 5 cm (d) 40 cm
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) a small paper cup (d) string
7. 7.True or false: a steering wheel is a lever. (a) False (b) True
8. 8.⚙️ Which of these is a lever? (a) a doorknob (b) a bottle opener (c) a steering wheel (d) a sloping road
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) the same string (c) number of pulleys (d) how hard we must pull
10. 10.True or false: a crane is a lever. (a) True (b) False
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) turmeric powder (d) coins as the load
12. 12.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
13. 13.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the bench (c) in the tap (d) on the blackboard
14. 14.⚖️ 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 change it (b) we measure it (c) we keep it the same
15. 15.⚖️ 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) how hard we must pull (c) the same string (d) number of pulleys
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a ramp (c) a spoon lifting a lid (d) a flagpole
18. 18.⚖️ 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
19. 19.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) the rope gets shorter (d) pulling down is easier
20. 20.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) coins as the load (d) yeast
22. 22.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) in a circle (d) up
23. 23.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
24. 24.True or false: a spoon lifting a lid is a lever. (a) True (b) False
25. 25.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a see-saw (c) a spoon lifting a lid (d) a crowbar
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) number of pulleys (c) how hard we must pull
27. 27.⚙️ Which of these uses a pulley? (a) a crane (b) a see-saw (c) a doorknob (d) a bottle opener
28. 28.True or false: a flagpole uses a pulley. (a) False (b) True
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) turmeric powder (d) coins as the load
30. 30.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) double (d) the same
31. 31.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
32. 32.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
33. 33.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
34. 34.True or false: a sloping road is a wheel and axle. (a) False (b) True
35. 35.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
36. 36.True or false: a tap handle is a wheel and axle. (a) True (b) False
37. 37.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
38. 38.⚖️ 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 change it (b) we keep it the same (c) we measure it
39. 39.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
40. 40.True or false: a doorknob is a lever. (a) False (b) True

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