Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 997 · 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.⚖️ 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
2. 2.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) rope (d) nail
3. 3.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
4. 4.True or false: a bottle opener is a wheel and axle. (a) False (b) True
5. 5.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) a pencil (d) a small paper cup
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a mirror (d) a pencil
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) turmeric powder (d) a small paper cup
8. 8.True or false: a flagpole uses a pulley. (a) True (b) False
9. 9.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the bench (c) in the tap (d) on the blackboard
10. 10.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
11. 11.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
12. 12.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it can hurt your finger (d) it gets longer
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
14. 14.⚖️ 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
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a pencil (d) yeast
16. 16.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a crowbar (c) a well pulley (d) a slide
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) number of pulleys (c) how hard we must pull
18. 18.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
19. 19.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
20. 20.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) halves the weight (d) adds weight
21. 21.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) sideways (d) in a circle
22. 22.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
23. 23.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a steering wheel (c) a see-saw (d) a slide
24. 24.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a slide (c) a well pulley (d) a crowbar
25. 25.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
26. 26.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
27. 27.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
28. 28.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) harder (d) the same
29. 29.True or false: a sloping road is an inclined plane. (a) False (b) True
30. 30.⚖️ 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 string (c) the lifting height (d) the same cup of coins
31. 31.⚖️ 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
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) how hard we must pull (c) number of pulleys
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) turmeric powder (c) string (d) a battery cell
34. 34.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a balloon (c) a small paper cup (d) a pencil
36. 36.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
37. 37.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
38. 38.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
39. 39.⚙️ Which of these is a lever? (a) a ramp (b) a doorknob (c) a see-saw (d) a crane
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) coins as the load (c) a balloon (d) a magnet

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