Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 986 · 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 a mirror for the thread-reel pulley? (a) needed (b) not needed
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a pencil (d) a balloon
3. 3.⚖️ 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 keep it the same (b) we measure it (c) we change it
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a battery cell (c) coins as the load (d) a small paper cup
5. 5.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
6. 6.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) in the tap (d) on the bench
7. 7.⚖️ 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
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) number of pulleys (d) the same cup of coins
9. 9.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
10. 10.⚖️ 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
11. 11.⚖️ 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) the same string (c) how hard we must pull
12. 12.⚖️ 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 cup of coins (c) the lifting height (d) how hard we must pull
13. 13.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 40 cm (d) 10 cm
14. 14.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) yeast (c) an empty thread reel (d) coins as the load
16. 16.⚙️ Which of these is a lever? (a) a well pulley (b) a tap handle (c) a steering wheel (d) a see-saw
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) string (d) coins as the load
18. 18.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) in a circle (c) sideways (d) up
19. 19.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we keep it the same (c) we change it
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) coins as the load (c) string (d) an empty thread reel
22. 22.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
23. 23.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
24. 24.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
25. 25.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
26. 26.True or false: a well pulley is a wheel and axle. (a) True (b) False
27. 27.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it might sing (d) it could fall on you
28. 28.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) harder (d) impossible
29. 29.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) the same (d) zero
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) a pencil (d) turmeric powder
31. 31.True or false: an empty thread reel 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: the same string is the one thing we change. (a) False (b) True
33. 33.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a crowbar (c) a sloping road (d) a crane
34. 34.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
35. 35.⚙️ Which of these uses a pulley? (a) a doorknob (b) a crowbar (c) a flagpole (d) a spoon lifting a lid
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a pencil (c) an empty thread reel (d) coins as the load
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) a magnet (d) string
38. 38.True or false: a well pulley uses a pulley. (a) False (b) True
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) a pencil (d) a battery cell
40. 40.True or false: a slide is a lever. (a) True (b) False

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