Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 420 · 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 same cup of coins (b) how hard we must pull (c) number of pulleys (d) the lifting height
2. 2.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
3. 3.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
4. 4.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) water gets lighter (d) pulling down is easier
5. 5.⚙️ Which of these uses a pulley? (a) a ramp (b) a spoon lifting a lid (c) a well pulley (d) a doorknob
6. 6.⚙️ Which of these is a lever? (a) a doorknob (b) a sloping road (c) a crane (d) a see-saw
7. 7.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) a pencil (d) string
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) an empty thread reel (d) a mirror
10. 10.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) double (d) zero
11. 11.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) on the bench (d) in the tap
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) an empty thread reel (d) a balloon
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
14. 14.⚙️ Which of these uses a pulley? (a) a see-saw (b) a steering wheel (c) a tap handle (d) a flagpole
15. 15.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) an empty thread reel (d) yeast
17. 17.🛟 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
18. 18.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it is magnetic (d) it might sing
19. 19.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same
21. 21.⚖️ 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 measure it (c) we keep it the same
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) True (b) False
23. 23.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a see-saw (c) a ramp (d) a steering wheel
24. 24.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) rope (d) magnet
25. 25.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
26. 26.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
27. 27.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a crane (c) a steering wheel (d) a sloping road
28. 28.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
30. 30.True or false: a sloping road is a lever. (a) False (b) True
31. 31.⚖️ 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
32. 32.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a tap handle (c) a see-saw (d) a ramp
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a small paper cup (d) turmeric powder
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
35. 35.True or false: a crane uses a pulley. (a) True (b) False
36. 36.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
37. 37.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) a pencil (d) string
39. 39.⚖️ 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) how hard we must pull (c) the same cup of coins (d) the lifting height
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it

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