Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 691 · 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 turmeric powder for the thread-reel pulley? (a) not needed (b) needed
2. 2.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) battery (d) rope
3. 3.True or false: a flagpole uses a pulley. (a) False (b) True
4. 4.⚖️ 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 keep it the same (c) we measure it
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
6. 6.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
7. 7.True or false: a steering wheel uses a pulley. (a) True (b) False
8. 8.⚖️ 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
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) string (d) a battery cell
10. 10.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) in a circle (d) sideways
11. 11.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a doorknob (c) a well pulley (d) a ramp
12. 12.⚖️ 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
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the same string (c) the lifting height (d) how hard we must pull
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) string (c) a pencil (d) a small paper cup
15. 15.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
16. 16.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
17. 17.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) double (d) zero
18. 18.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it turns blue (d) it gets wet
19. 19.⚖️ 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
20. 20.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
21. 21.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
22. 22.True or false: a doorknob uses a pulley. (a) True (b) False
23. 23.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
24. 24.⚖️ 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
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) yeast (c) string (d) an empty thread reel
26. 26.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
27. 27.True or false: a bottle opener is a lever. (a) True (b) False
28. 28.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a well pulley (c) a see-saw (d) a doorknob
29. 29.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
30. 30.⚙️ Which of these uses a pulley? (a) a sloping road (b) a well pulley (c) a see-saw (d) a steering wheel
31. 31.🧺 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) string
32. 32.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
33. 33.⚙️ Which of these uses a pulley? (a) a slide (b) a ramp (c) a flagpole (d) a crowbar
34. 34.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
35. 35.⚖️ 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 lifting height
36. 36.⚖️ 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) True (b) False
37. 37.🛟 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
38. 38.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
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 measure it (c) we keep it the same
40. 40.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False

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