Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 958 · 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.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
2. 2.🧺 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 small paper cup (d) a balloon
3. 3.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) a battery cell (d) a small paper cup
5. 5.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
6. 6.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
7. 7.⚖️ 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 measure it (b) we keep it the same (c) we change it
8. 8.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) the same (d) about half
9. 9.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) down (d) up
10. 10.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 40 cm (d) 10 cm
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) yeast (c) an empty thread reel (d) a small paper cup
12. 12.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a mirror (c) a battery cell (d) yeast
14. 14.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
15. 15.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
16. 16.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
17. 17.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
18. 18.⚙️ Which of these uses a pulley? (a) a sloping road (b) a well pulley (c) a doorknob (d) a ramp
19. 19.⚖️ 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) True (b) False
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
21. 21.⚖️ 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
22. 22.⚖️ 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
23. 23.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it could fall on you (d) it gets hot
24. 24.True or false: a spoon lifting a lid is a lever. (a) False (b) True
25. 25.⚙️ Which of these is a lever? (a) a slide (b) a flagpole (c) a ramp (d) a spoon lifting a lid
26. 26.⚖️ 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) number of pulleys (c) how hard we must pull (d) the same cup of coins
27. 27.True or false: a ramp is a lever. (a) False (b) True
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the same cup of coins (c) how hard we must pull (d) the same string
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
30. 30.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
31. 31.⚙️ Which of these is a wheel and axle? (a) a crane (b) a crowbar (c) a doorknob (d) a sloping road
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) a balloon (d) a pencil
33. 33.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) yeast (c) a small paper cup (d) a pencil
35. 35.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
36. 36.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
37. 37.⚙️ Which of these is a lever? (a) a crowbar (b) a flagpole (c) a well pulley (d) a slide
38. 38.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
39. 39.⚙️ Which simple machine is a see-saw? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
40. 40.⚖️ 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) number of pulleys (c) the same cup of coins

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