Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 960 · 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.True or false: a slide is a lever. (a) True (b) False
2. 2.⚖️ 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) True (b) False
3. 3.⚙️ Which of these is a lever? (a) a steering wheel (b) a well pulley (c) a sloping road (d) a bottle opener
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) a mirror (d) coins as the load
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) a pencil (d) yeast
6. 6.⚙️ Which of these is a lever? (a) a flagpole (b) a spoon lifting a lid (c) a well pulley (d) a steering wheel
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) string (d) a balloon
8. 8.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) string (c) a balloon (d) yeast
10. 10.⚖️ 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
11. 11.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) in the tap (d) on the flagpole
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) string (d) a mirror
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) yeast (d) an empty thread reel
14. 14.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
15. 15.⚖️ 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
16. 16.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) adds weight (d) changes pull direction
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a magnet (d) a pencil
18. 18.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a mirror (c) string (d) a pencil
20. 20.⚖️ 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
21. 21.⚖️ 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) the same cup of coins (c) the lifting height (d) how hard we must pull
22. 22.⚙️ Which simple machine is a tap handle? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
23. 23.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
24. 24.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
25. 25.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
26. 26.⚖️ 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) False (b) True
27. 27.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
28. 28.True or false: a steering wheel is a wheel and axle. (a) False (b) True
29. 29.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
30. 30.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
31. 31.⚖️ 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
32. 32.⚖️ 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 keep it the same (c) we change it
33. 33.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
34. 34.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
35. 35.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 20 cm (d) 5 cm
36. 36.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) water gets lighter (d) the rope gets shorter
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
38. 38.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
39. 39.⚖️ 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
40. 40.True or false: a slide is a wheel and axle. (a) False (b) True

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids