Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 941 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) string (d) a mirror
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) string (d) a battery cell
3. 3.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
4. 4.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
5. 5.⚖️ 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) how hard we must pull (c) the lifting height (d) the same cup of coins
6. 6.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) harder (d) easier
7. 7.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
8. 8.True or false: a slide is an inclined plane. (a) False (b) True
9. 9.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
10. 10.True or false: a slide is a lever. (a) True (b) False
11. 11.⚙️ Which of these uses a pulley? (a) a doorknob (b) a crane (c) a slide (d) a tap handle
12. 12.🛟 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
13. 13.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
14. 14.🧺 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) turmeric powder (d) a pencil
15. 15.🛟 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
16. 16.⚖️ 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) False (b) True
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) an empty thread reel (d) a magnet
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) False (b) True
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a balloon (c) a pencil (d) coins as the load
20. 20.⚖️ 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 change it (c) we measure it
21. 21.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) how hard we must pull (c) number of pulleys
23. 23.⚖️ 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 keep it the same (b) we change it (c) we measure it
24. 24.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) nail (d) rope
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same string (c) number of pulleys (d) the same cup of coins
26. 26.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
27. 27.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
28. 28.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
29. 29.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
30. 30.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
31. 31.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
32. 32.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) turmeric powder (c) a magnet (d) a balloon
34. 34.True or false: a flagpole is a lever. (a) True (b) False
35. 35.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a pencil (c) coins as the load (d) a small paper cup
37. 37.⚖️ 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
38. 38.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) string (d) coins as the load
40. 40.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley

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