Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 351 · 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.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) a battery cell (d) an empty thread reel
2. 2.⚖️ 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
3. 3.⚖️ 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 change it (c) we keep it the same
4. 4.True or false: a ramp is a lever. (a) False (b) True
5. 5.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
6. 6.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
7. 7.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
8. 8.True or false: a crowbar is a lever. (a) False (b) True
9. 9.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 10 cm (d) 5 cm
10. 10.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
11. 11.⚖️ 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
12. 12.⚙️ Which of these is a lever? (a) a see-saw (b) a crane (c) a flagpole (d) a steering wheel
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) coins as the load (d) turmeric powder
14. 14.⚖️ 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 string
15. 15.True or false: a see-saw uses a pulley. (a) True (b) False
16. 16.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) up (d) down
17. 17.⚖️ 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 lifting height (c) the same string (d) how hard we must pull
18. 18.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) a pencil (c) coins as the load (d) an empty thread reel
20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) an empty thread reel (d) a battery cell
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) coins as the load (c) an empty thread reel (d) a small paper cup
22. 22.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a sloping road (c) a crane (d) a spoon lifting a lid
23. 23.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a crane (c) a tap handle (d) a steering wheel
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
25. 25.True or false: a ramp is an inclined plane. (a) False (b) True
26. 26.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
27. 27.True or false: a crane uses a pulley. (a) True (b) False
28. 28.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
29. 29.⚙️ Which of these uses a pulley? (a) a flagpole (b) a slide (c) a crowbar (d) a see-saw
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a battery cell (c) yeast (d) a magnet
31. 31.⚖️ 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
32. 32.🛟 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
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same cup of coins”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.⚙️ Which of these is a wheel and axle? (a) a crane (b) a see-saw (c) a flagpole (d) a doorknob
35. 35.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) turmeric powder (c) an empty thread reel (d) a small paper cup
37. 37.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
38. 38.⚖️ 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) True (b) False
39. 39.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the blackboard (d) on the flagpole
40. 40.True or false: a well pulley uses a pulley. (a) False (b) True

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