Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 781 · 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.🔮 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
2. 2.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
3. 3.⚖️ 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
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) turmeric powder (d) a pencil
5. 5.⚙️ Which of these uses a pulley? (a) a flagpole (b) a tap handle (c) a see-saw (d) a spoon lifting a lid
6. 6.⚙️ Which simple machine is a see-saw? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
7. 7.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a crane (c) a flagpole (d) a steering wheel
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) turmeric powder (c) string (d) a pencil
9. 9.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
10. 10.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the flagpole (c) in the tap (d) on the blackboard
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) the lifting height (c) number of pulleys (d) how hard we must pull
12. 12.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) sideways (d) up
13. 13.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) magnet (d) nail
14. 14.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
15. 15.⚖️ 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
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) yeast (c) a battery cell (d) turmeric powder
17. 17.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
18. 18.True or false: string is needed for the thread-reel pulley. (a) False (b) True
19. 19.⚖️ 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
20. 20.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
21. 21.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same
23. 23.⚖️ 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 lifting height
24. 24.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
25. 25.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a crane (c) a doorknob (d) a slide
26. 26.⚖️ 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 cup of coins
27. 27.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
28. 28.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
29. 29.True or false: a spoon lifting a lid is a lever. (a) True (b) False
30. 30.True or false: a bottle opener is a lever. (a) False (b) True
31. 31.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it could fall on you (d) it gets hot
32. 32.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
33. 33.⚖️ 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
34. 34.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
35. 35.⚙️ Which simple machine is a slide? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
36. 36.⚖️ 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
37. 37.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
38. 38.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
39. 39.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
40. 40.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley

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