Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 675 · 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.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
2. 2.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a bottle opener (c) a see-saw (d) a doorknob
3. 3.⚖️ 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
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
5. 5.⚙️ Which of these is a lever? (a) a doorknob (b) a flagpole (c) a bottle opener (d) a ramp
6. 6.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) pulling down is easier (d) water gets lighter
7. 7.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) impossible (d) the same
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) string (d) yeast
10. 10.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
11. 11.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it might sing (d) it is magnetic
12. 12.True or false: a crowbar is an inclined plane. (a) False (b) True
13. 13.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) False (b) True
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
17. 17.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) a mirror (d) yeast
19. 19.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
20. 20.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
21. 21.True or false: a ramp is a lever. (a) False (b) True
22. 22.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) down (d) in a circle
23. 23.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
24. 24.⚖️ 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
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a small paper cup (c) string (d) coins as the load
26. 26.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
27. 27.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
28. 28.True or false: string is needed for the thread-reel pulley. (a) True (b) False
29. 29.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 40 cm (d) 10 cm
30. 30.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a well pulley (c) a sloping road (d) a steering wheel
31. 31.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the same string (c) the lifting height (d) the same cup of coins
34. 34.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
35. 35.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) a balloon (d) a battery cell
37. 37.⚖️ 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
38. 38.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
39. 39.⚙️ Which of these is a lever? (a) a doorknob (b) a see-saw (c) a ramp (d) a crane
40. 40.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet

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