Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 195 · 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.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) a mirror (d) an empty thread reel
2. 2.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) magnet (d) nail
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a magnet (d) a pencil
4. 4.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
5. 5.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) a pencil (d) a battery cell
7. 7.🛟 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
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a battery cell (d) string
9. 9.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a sloping road (c) a crowbar (d) a tap handle
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) string (d) yeast
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) string (c) a balloon (d) yeast
12. 12.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
13. 13.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
14. 14.⚖️ 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
15. 15.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
16. 16.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
17. 17.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
18. 18.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
19. 19.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
20. 20.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it could fall on you (d) it gets hot
21. 21.⚙️ Which of these is a lever? (a) a sloping road (b) a bottle opener (c) a tap handle (d) a slide
22. 22.⚙️ Which of these uses a pulley? (a) a see-saw (b) a doorknob (c) a well pulley (d) a tap handle
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a pencil (d) turmeric powder
24. 24.⚖️ 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 change it (c) we measure it
25. 25.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
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) how hard we must pull (c) number of pulleys
27. 27.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
28. 28.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) a pencil (c) a small paper cup (d) an empty thread reel
30. 30.⚖️ 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 lifting height (c) how hard we must pull
31. 31.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
32. 32.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
34. 34.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
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.⚖️ 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
37. 37.⚖️ 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
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) the same string (b) the same cup of coins (c) how hard we must pull (d) number of pulleys
39. 39.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) pulling down is easier (d) the bucket floats
40. 40.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed

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