Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 817 · 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 can hurt your finger (c) it gets longer (d) it gets wet
2. 2.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
3. 3.True or false: a sloping road is a wheel and axle. (a) True (b) False
4. 4.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
5. 5.⚙️ Which of these uses a pulley? (a) a flagpole (b) a slide (c) a steering wheel (d) a doorknob
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) a battery cell (d) coins as the load
8. 8.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) an empty thread reel (c) string (d) a small paper cup
10. 10.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 10 cm (d) 40 cm
11. 11.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
12. 12.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
13. 13.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) pulling down is easier (c) the rope gets shorter (d) water gets lighter
14. 14.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a balloon (c) coins as the load (d) a pencil
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a mirror (c) turmeric powder (d) yeast
17. 17.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
18. 18.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same
20. 20.⚖️ 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
21. 21.⚖️ 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) the lifting height (c) how hard we must pull
22. 22.True or false: a well pulley is a wheel and axle. (a) False (b) True
23. 23.⚖️ 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) True (b) False
24. 24.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
25. 25.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
26. 26.🧺 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 pencil (d) turmeric powder
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) False (b) True
28. 28.True or false: a bottle opener is a lever. (a) True (b) False
29. 29.⚖️ 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) the same string (c) how hard we must pull
30. 30.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
31. 31.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
33. 33.True or false: a steering wheel is a wheel and axle. (a) True (b) False
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) the same cup of coins (c) number of pulleys (d) how hard we must pull
35. 35.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
36. 36.⚖️ 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
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) a mirror (d) an empty thread reel
38. 38.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
39. 39.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a well pulley (c) a steering wheel (d) a ramp
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) True (b) False

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