Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 969 · 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 more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) harder (d) easier
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) yeast (d) a balloon
4. 4.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it could fall on you (d) it is magnetic
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) the same string (c) number of pulleys
6. 6.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it gets longer (d) it turns blue
7. 7.⚙️ Which simple machine is a crane? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
8. 8.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
9. 9.⚖️ 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
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a pencil (d) yeast
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a battery cell (d) string
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) string (c) a pencil (d) coins as the load
13. 13.True or false: a steering wheel is a wheel and axle. (a) False (b) True
14. 14.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a ramp (c) a tap handle (d) a crowbar
15. 15.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) a small paper cup (c) string (d) coins as the load
17. 17.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
18. 18.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
19. 19.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) the same string (c) number of pulleys (d) how hard we must pull
21. 21.⚖️ 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
22. 22.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
23. 23.⚙️ Which simple machine is a crowbar? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
24. 24.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
25. 25.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) yeast (c) coins as the load (d) a mirror
27. 27.⚖️ 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 change it (c) we keep it the same
28. 28.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a balloon (c) an empty thread reel (d) a pencil
30. 30.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) sideways (d) down
31. 31.⚖️ 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
32. 32.⚙️ Which of these is a lever? (a) a tap handle (b) a ramp (c) a doorknob (d) a see-saw
33. 33.⚙️ Which of these is a lever? (a) a slide (b) a spoon lifting a lid (c) a flagpole (d) a tap handle
34. 34.True or false: a sloping road uses a pulley. (a) True (b) False
35. 35.True or false: a tap handle is a wheel and axle. (a) False (b) True
36. 36.True or false: a well pulley is an inclined plane. (a) False (b) True
37. 37.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
38. 38.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) a mirror (d) string
40. 40.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed

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