Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 124 · 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.⚖️ 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
2. 2.⚖️ 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
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) an empty thread reel (c) string (d) a small paper cup
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a magnet (c) a pencil (d) a small paper cup
5. 5.⚖️ 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 cup of coins (c) the same string (d) number of pulleys
6. 6.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
7. 7.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
8. 8.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
9. 9.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) up (d) sideways
10. 10.⚙️ Which of these uses a pulley? (a) a see-saw (b) a bottle opener (c) a steering wheel (d) a well pulley
11. 11.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets longer (d) it gets wet
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a magnet (c) an empty thread reel (d) a small paper cup
13. 13.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
14. 14.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
15. 15.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
16. 16.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
17. 17.True or false: a tap handle is a wheel and axle. (a) False (b) True
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
19. 19.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
20. 20.⚖️ 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
21. 21.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a doorknob (c) a well pulley (d) a crowbar
22. 22.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
23. 23.True or false: a sloping road is an inclined plane. (a) True (b) False
24. 24.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) a small paper cup (d) coins as the load
26. 26.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
27. 27.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
28. 28.True or false: a see-saw is a lever. (a) False (b) True
29. 29.True or false: string is needed for the thread-reel pulley. (a) True (b) False
30. 30.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
31. 31.True or false: a slide uses a pulley. (a) False (b) True
32. 32.⚖️ 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
33. 33.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a battery cell (d) an empty thread reel
35. 35.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a steering wheel (c) a flagpole (d) a slide
36. 36.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys
38. 38.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
39. 39.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
40. 40.🧺 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) yeast

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