Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 769 · 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) True (b) False
2. 2.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
3. 3.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
4. 4.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
5. 5.True or false: a slide is an inclined plane. (a) False (b) True
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) turmeric powder (c) coins as the load (d) an empty thread reel
7. 7.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
8. 8.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
9. 9.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
10. 10.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a tap handle (c) a well pulley (d) a see-saw
11. 11.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) sideways (d) down
12. 12.⚖️ 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 lifting height (c) how hard we must pull (d) the same string
13. 13.⚖️ 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
14. 14.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
15. 15.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets wet (d) it gets longer
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) an empty thread reel (d) a mirror
17. 17.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) impossible (d) easier
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a small paper cup (c) string (d) coins as the load
19. 19.⚖️ 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
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) string (d) a battery cell
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a magnet (c) a small paper cup (d) an empty thread reel
22. 22.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
23. 23.⚖️ 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) True (b) False
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) string (d) a battery cell
25. 25.True or false: a bottle opener is a lever. (a) True (b) False
26. 26.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it is magnetic (d) it might sing
27. 27.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) on the flagpole (d) in the tap
28. 28.⚙️ Which of these uses a pulley? (a) a ramp (b) a flagpole (c) a tap handle (d) a slide
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) a mirror (d) a small paper cup
30. 30.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
31. 31.⚙️ Which of these is an inclined plane? (a) a crane (b) a crowbar (c) a sloping road (d) a bottle opener
32. 32.True or false: a steering wheel is a wheel and axle. (a) False (b) True
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a balloon (c) an empty thread reel (d) string
34. 34.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
35. 35.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
36. 36.True or false: a flagpole is a wheel and axle. (a) True (b) False
37. 37.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) a small paper cup (d) a balloon
39. 39.⚖️ 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
40. 40.⚙️ Which of these is a lever? (a) a slide (b) a flagpole (c) a crane (d) a see-saw

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