Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 916 · 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: number of pulleys is kept the same. (a) False (b) True
2. 2.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 10 cm (d) 5 cm
3. 3.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
4. 4.True or false: a steering wheel is an inclined plane. (a) True (b) False
5. 5.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) string (c) a small paper cup (d) a pencil
6. 6.True or false: a bottle opener is a wheel and axle. (a) True (b) False
7. 7.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
8. 8.⚖️ 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
9. 9.⚖️ 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
10. 10.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
11. 11.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
12. 12.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) in the tap (c) on the blackboard (d) on the bench
13. 13.⚙️ Which of these is a lever? (a) a slide (b) a doorknob (c) a flagpole (d) a see-saw
14. 14.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
15. 15.True or false: a tap handle is a wheel and axle. (a) False (b) True
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a pencil (d) a balloon
17. 17.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
18. 18.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
19. 19.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
20. 20.⚖️ 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) how hard we must pull (c) the same cup of coins (d) the same string
21. 21.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) water gets lighter (c) the bucket floats (d) the rope gets shorter
22. 22.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
23. 23.⚙️ Which of these is a lever? (a) a well pulley (b) a steering wheel (c) a tap handle (d) a spoon lifting a lid
24. 24.⚖️ 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 change it (b) we keep it the same (c) we measure it
25. 25.🧺 Do we need string 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? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
27. 27.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) turmeric powder (d) a pencil
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we measure it (b) we keep it the same (c) we change it
30. 30.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a ramp (c) a crowbar (d) a spoon lifting a lid
31. 31.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a crane (c) a slide (d) a spoon lifting a lid
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a pencil (c) coins as the load (d) a small paper cup
33. 33.⚖️ 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
34. 34.⚙️ Which of these uses a pulley? (a) a see-saw (b) a crowbar (c) a slide (d) a crane
35. 35.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
36. 36.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a tap handle (c) a crane (d) a slide
37. 37.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the same string (c) the same cup of coins (d) number of pulleys
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) yeast (d) string
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) a magnet (d) a battery cell

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