Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 53 · 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: yeast is needed for the thread-reel pulley. (a) False (b) True
2. 2.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) makes it magnetic (c) halves the weight (d) adds weight
3. 3.⚖️ 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
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the same cup of coins
5. 5.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
6. 6.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
7. 7.🏗️ 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
8. 8.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
9. 9.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
10. 10.⚙️ Which of these is an inclined plane? (a) a crane (b) a see-saw (c) a ramp (d) a well pulley
11. 11.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) sideways (d) down
12. 12.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a doorknob (c) a sloping road (d) a crane
13. 13.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
14. 14.⚖️ 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) the same cup of coins (d) how hard we must pull
15. 15.True or false: a spoon lifting a lid is a lever. (a) False (b) True
16. 16.🧺 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) string (d) a balloon
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) coins as the load (c) a small paper cup (d) a pencil
18. 18.⚙️ Which of these is a lever? (a) a doorknob (b) a spoon lifting a lid (c) a steering wheel (d) a ramp
19. 19.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
20. 20.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
21. 21.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a flagpole (c) a well pulley (d) a spoon lifting a lid
22. 22.🛟 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
23. 23.⚙️ Which of these uses a pulley? (a) a tap handle (b) a crowbar (c) a flagpole (d) a steering wheel
24. 24.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) coins as the load (d) a magnet
26. 26.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
27. 27.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
28. 28.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
29. 29.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
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) number of pulleys (b) the same string (c) the same cup of coins (d) the lifting height
31. 31.⚖️ 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
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we measure it (c) we change it
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
34. 34.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) string (d) a pencil
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) an empty thread reel (c) turmeric powder (d) a battery cell
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) an empty thread reel (d) string
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a pencil (c) a battery cell (d) a magnet
39. 39.⚙️ Which of these is an inclined plane? (a) a slide (b) a see-saw (c) a well pulley (d) a doorknob
40. 40.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed

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