Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 322 · 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.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
2. 2.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) in the tap (d) on the flagpole
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) an empty thread reel (c) a mirror (d) a magnet
4. 4.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
5. 5.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
6. 6.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
7. 7.⚖️ 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
8. 8.True or false: a well pulley is an inclined plane. (a) False (b) True
9. 9.⚙️ Which of these is a lever? (a) a steering wheel (b) a crane (c) a spoon lifting a lid (d) a slide
10. 10.⚖️ 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
11. 11.True or false: a slide is an inclined plane. (a) False (b) True
12. 12.⚙️ Which of these is a lever? (a) a well pulley (b) a bottle opener (c) a sloping road (d) a crane
13. 13.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a steering wheel (c) a slide (d) a crowbar
14. 14.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a crane (c) a tap handle (d) a slide
15. 15.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) adds weight (d) makes it magnetic
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) a mirror (d) a pencil
17. 17.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) the same (d) about half
18. 18.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) a balloon (d) an empty thread reel
20. 20.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
21. 21.True or false: a crane uses a pulley. (a) True (b) False
22. 22.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
23. 23.⚖️ 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
24. 24.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a battery cell (c) a small paper cup (d) coins as the load
26. 26.⚖️ 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 change it (c) we keep it the same
27. 27.⚖️ 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
28. 28.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a steering wheel (c) a doorknob (d) a ramp
29. 29.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it gets hot (d) it could fall on you
30. 30.⚖️ 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 measure it (b) we change it (c) we keep it the same
31. 31.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
32. 32.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
33. 33.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
34. 34.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) string (d) turmeric powder
36. 36.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
37. 37.True or false: a crowbar is an inclined plane. (a) True (b) False
38. 38.⚙️ Which of these is an inclined plane? (a) a crane (b) a see-saw (c) a sloping road (d) a flagpole
39. 39.🧺 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 pencil (d) yeast
40. 40.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer

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