Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 75 · 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.🧺 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) turmeric powder
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a battery cell (c) a pencil (d) an empty thread reel
3. 3.True or false: a crane is a lever. (a) False (b) True
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) a balloon (d) an empty thread reel
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.⚖️ 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
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) a magnet (d) a pencil
8. 8.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
9. 9.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
10. 10.⚙️ Which of these is an inclined plane? (a) a crane (b) a sloping road (c) a well pulley (d) a bottle opener
11. 11.⚖️ 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
12. 12.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a sloping road (c) a steering wheel (d) a doorknob
13. 13.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
14. 14.🧺 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) string (d) a magnet
15. 15.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
16. 16.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) yeast (d) a small paper cup
18. 18.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
19. 19.⚙️ Which of these uses a pulley? (a) a ramp (b) a sloping road (c) a crane (d) a see-saw
20. 20.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
21. 21.⚖️ 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) False (b) True
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a small paper cup (d) a battery cell
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) a pencil (d) yeast
24. 24.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
25. 25.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
26. 26.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) down (d) sideways
27. 27.⚖️ 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
28. 28.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
29. 29.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
30. 30.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
31. 31.⚖️ 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) how hard we must pull (c) the lifting height (d) the same cup of coins
32. 32.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
33. 33.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
34. 34.⚖️ 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 lifting height
35. 35.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
36. 36.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
37. 37.⚖️ 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 keep it the same (c) we change it
38. 38.⚖️ 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) True (b) False
39. 39.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
40. 40.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed

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