Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 602 · 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? Which of these is what we measure? (a) the lifting height (b) number of pulleys (c) the same string (d) how hard we must pull
2. 2.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it is magnetic (d) it could fall on you
3. 3.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) double (d) the same
4. 4.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the flagpole (d) on the bench
5. 5.⚙️ Which of these uses a pulley? (a) a flagpole (b) a ramp (c) a doorknob (d) a sloping road
6. 6.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) an empty thread reel (c) turmeric powder (d) a magnet
8. 8.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a small paper cup (d) a magnet
10. 10.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) easier (d) harder
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same
12. 12.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
13. 13.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a spoon lifting a lid (c) a flagpole (d) a tap handle
14. 14.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
15. 15.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet
16. 16.True or false: a steering wheel is an inclined plane. (a) True (b) False
17. 17.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) yeast (c) an empty thread reel (d) a pencil
19. 19.🧺 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) an empty thread reel (d) turmeric powder
20. 20.⚖️ 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
21. 21.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
22. 22.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a doorknob (c) a see-saw (d) a spoon lifting a lid
23. 23.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
24. 24.⚖️ 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) the same cup of coins (c) number of pulleys
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) string (d) a small paper cup
26. 26.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a balloon (d) string
28. 28.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a crane (c) a bottle opener (d) a sloping road
29. 29.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
30. 30.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
31. 31.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
32. 32.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a pencil (d) yeast
34. 34.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a slide (c) a spoon lifting a lid (d) a steering wheel
35. 35.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) makes it magnetic (d) adds weight
36. 36.⚖️ 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 cup of coins (c) the same string (d) the lifting height
37. 37.True or false: a bottle opener uses a pulley. (a) True (b) False
38. 38.⚖️ 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
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) string (c) a mirror (d) yeast
40. 40.True or false: a sloping road is a lever. (a) False (b) True

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