Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 393 · 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 a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
2. 2.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
3. 3.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) on the flagpole (d) in the tap
4. 4.⚙️ Which of these is a wheel and axle? (a) a crane (b) a sloping road (c) a doorknob (d) a slide
5. 5.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) the bucket floats (d) pulling down is easier
6. 6.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
7. 7.⚖️ 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
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) a mirror (d) a balloon
9. 9.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
10. 10.True or false: a steering wheel is an inclined plane. (a) False (b) True
11. 11.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) impossible (d) easier
12. 12.⚖️ 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
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) an empty thread reel (c) coins as the load (d) string
14. 14.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
15. 15.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a crowbar (c) a sloping road (d) a crane
16. 16.⚙️ Which of these is an inclined plane? (a) a ramp (b) a steering wheel (c) a flagpole (d) a spoon lifting a lid
17. 17.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
18. 18.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
19. 19.⚖️ 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
20. 20.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it gets wet (d) it can hurt your finger
21. 21.True or false: a slide is an inclined plane. (a) True (b) False
22. 22.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) coins as the load (d) a magnet
24. 24.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
27. 27.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) a pencil (d) yeast
29. 29.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a tap handle (c) a flagpole (d) a sloping road
30. 30.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
31. 31.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
32. 32.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
33. 33.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
34. 34.True or false: a crane is a wheel and axle. (a) True (b) False
35. 35.True or false: a tap handle is a wheel and axle. (a) False (b) True
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) number of pulleys (c) the lifting height (d) the same string
37. 37.True or false: a mirror is 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? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the lifting height
39. 39.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a crane (c) a tap handle (d) a ramp
40. 40.🧺 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 pencil (d) a magnet

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