Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 784 · 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.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) a pencil (d) an empty thread reel
2. 2.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it could fall on you (d) it is magnetic
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.⚖️ 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) True (b) False
5. 5.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
6. 6.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a balloon (d) a pencil
8. 8.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
9. 9.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
10. 10.True or false: a doorknob is a lever. (a) False (b) True
11. 11.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
12. 12.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
13. 13.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
14. 14.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
15. 15.⚖️ 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
16. 16.🧺 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 mirror (d) string
17. 17.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) changes pull direction (d) halves the weight
18. 18.⚖️ 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 same cup of coins (d) the lifting height
19. 19.⚙️ Which of these is a lever? (a) a tap handle (b) a flagpole (c) a crowbar (d) a steering wheel
20. 20.⚖️ 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
21. 21.⚙️ Which of these is a lever? (a) a slide (b) a see-saw (c) a flagpole (d) a tap handle
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
23. 23.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
24. 24.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
25. 25.True or false: a flagpole uses a pulley. (a) False (b) True
26. 26.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
28. 28.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a sloping road (c) a crowbar (d) a doorknob
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) a pencil (d) yeast
30. 30.True or false: a flagpole is a lever. (a) True (b) False
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) a magnet (d) turmeric powder
32. 32.True or false: a steering wheel is a lever. (a) False (b) True
33. 33.⚖️ 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
34. 34.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
35. 35.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
36. 36.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
37. 37.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) sideways (d) up
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) how hard we must pull (c) number of pulleys
39. 39.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it can hurt your finger (d) it turns blue
40. 40.⚖️ 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

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