Pulley STEM Project Worksheet

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

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