Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 548 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) coins as the load (d) a balloon
2. 2.⚖️ 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 measure it (b) we change it (c) we keep it the same
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 keep it the same (b) we measure it (c) we change it
4. 4.True or false: a see-saw uses a pulley. (a) True (b) False
5. 5.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) down (d) up
6. 6.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
7. 7.⚙️ Which of these is a lever? (a) a crane (b) a crowbar (c) a ramp (d) a flagpole
8. 8.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
9. 9.⚖️ 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
10. 10.True or false: a steering wheel is an inclined plane. (a) False (b) True
11. 11.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
12. 12.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) water gets lighter (d) pulling down is easier
13. 13.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
14. 14.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) on the bench (d) in the tap
15. 15.⚖️ 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
16. 16.🛟 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
17. 17.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) the same (d) impossible
18. 18.⚖️ 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) the same string (d) how hard we must pull
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a mirror (d) a small paper cup
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) an empty thread reel (c) string (d) a pencil
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) False (b) True
22. 22.⚙️ Which of these is a lever? (a) a well pulley (b) a tap handle (c) a flagpole (d) a bottle opener
23. 23.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
24. 24.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a spoon lifting a lid (c) a flagpole (d) a doorknob
25. 25.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) turmeric powder (c) a small paper cup (d) a pencil
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a battery cell (c) an empty thread reel (d) string
28. 28.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a battery cell (c) a small paper cup (d) a magnet
30. 30.⚖️ 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 same string
31. 31.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 20 cm (d) 10 cm
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) string (d) yeast
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) string (d) an empty thread reel
34. 34.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
35. 35.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
36. 36.True or false: a see-saw is a wheel and axle. (a) True (b) False
37. 37.⚖️ 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
38. 38.⚙️ Which simple machine is a ramp? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
39. 39.True or false: a bottle opener is a lever. (a) False (b) True
40. 40.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever

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