Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 212 · 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) coins as the load (b) yeast (c) a balloon (d) turmeric powder
2. 2.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) up (d) in a circle
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a mirror (d) coins as the load
4. 4.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
5. 5.⚙️ Which simple machine is a crowbar? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
6. 6.🧺 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) string (d) turmeric powder
7. 7.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 5 cm (d) 10 cm
8. 8.⚖️ 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) number of pulleys (c) how hard we must pull (d) the same cup of coins
9. 9.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) easier (d) harder
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) coins as the load (d) string
11. 11.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
12. 12.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) yeast (d) a small paper cup
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
15. 15.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it might sing (d) it is magnetic
16. 16.⚙️ Which of these is a lever? (a) a crane (b) a flagpole (c) a doorknob (d) a see-saw
17. 17.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a battery cell (d) a small paper cup
19. 19.True or false: a sloping road is a lever. (a) False (b) True
20. 20.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
21. 21.⚖️ 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
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a mirror (c) string (d) yeast
24. 24.⚙️ Which of these is a lever? (a) a crowbar (b) a tap handle (c) a crane (d) a doorknob
25. 25.⚖️ 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
26. 26.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
27. 27.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) makes it magnetic (c) halves the weight (d) adds weight
28. 28.⚖️ 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) False (b) True
29. 29.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we keep it the same (c) we change it
31. 31.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) a mirror (d) an empty thread reel
33. 33.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
35. 35.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
36. 36.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
37. 37.True or false: string is needed for the thread-reel pulley. (a) True (b) False
38. 38.True or false: a tap handle is a wheel and axle. (a) False (b) True
39. 39.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
40. 40.True or false: a crowbar is a lever. (a) True (b) False

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