Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 837 · 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.🛟 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
2. 2.⚖️ 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
3. 3.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
4. 4.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
5. 5.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
6. 6.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
7. 7.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it gets wet (d) it can hurt your finger
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a pencil (c) coins as the load (d) string
9. 9.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
10. 10.True or false: a flagpole uses a pulley. (a) False (b) True
11. 11.⚖️ 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
12. 12.True or false: a steering wheel is an inclined plane. (a) True (b) False
13. 13.⚖️ 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) number of pulleys (c) how hard we must pull (d) the same string
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a pencil (c) string (d) coins as the load
15. 15.True or false: a crowbar is a lever. (a) False (b) True
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) coins as the load (d) string
17. 17.True or false: a doorknob uses a pulley. (a) False (b) True
18. 18.⚖️ 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
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a mirror (c) yeast (d) a magnet
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) a pencil (d) a battery cell
21. 21.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a balloon (d) coins as the load
23. 23.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
24. 24.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
25. 25.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) water gets lighter (d) pulling down is easier
26. 26.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) yeast (d) an empty thread reel
28. 28.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
29. 29.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
30. 30.True or false: a crane is an inclined plane. (a) False (b) True
31. 31.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
32. 32.⚖️ 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
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) a mirror (d) a small paper cup
34. 34.⚖️ 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) number of pulleys (d) the same cup of coins
35. 35.⚙️ Which of these is a lever? (a) a flagpole (b) a see-saw (c) a crane (d) a ramp
36. 36.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
37. 37.⚖️ 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) False (b) True
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) False (b) True
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) False (b) True

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