Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 926 · 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.⚖️ 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 keep it the same (c) we measure it
2. 2.⚖️ 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) number of pulleys
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
4. 4.🏗️ 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
5. 5.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a ramp (c) a flagpole (d) a spoon lifting a lid
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) yeast (c) a pencil (d) an empty thread reel
7. 7.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) yeast (c) a balloon (d) string
9. 9.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) makes it magnetic (d) changes pull direction
10. 10.⚖️ 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) False (b) True
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) an empty thread reel (c) a pencil (d) coins as the load
12. 12.⚙️ Which of these is a lever? (a) a doorknob (b) a bottle opener (c) a crane (d) a well pulley
13. 13.⚖️ 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) how hard we must pull (d) the lifting height
14. 14.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) an empty thread reel (d) turmeric powder
16. 16.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
17. 17.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
18. 18.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a battery cell (d) turmeric powder
20. 20.True or false: a well pulley is an inclined plane. (a) True (b) False
21. 21.⚙️ Which of these uses a pulley? (a) a slide (b) a doorknob (c) a flagpole (d) a steering wheel
22. 22.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
23. 23.True or false: a crane is a wheel and axle. (a) False (b) True
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) yeast (d) a pencil
25. 25.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
26. 26.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
27. 27.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) easier (d) harder
28. 28.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a slide (c) a steering wheel (d) a spoon lifting a lid
29. 29.⚖️ 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 measure it (b) we change it (c) we keep it the same
30. 30.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
31. 31.True or false: a ramp is a wheel and axle. (a) False (b) True
32. 32.⚖️ 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
33. 33.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
34. 34.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
35. 35.⚖️ 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
36. 36.⚖️ 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) False (b) True
37. 37.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) a mirror (d) an empty thread reel
39. 39.True or false: a spoon lifting a lid is a lever. (a) False (b) True
40. 40.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True

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