## ShikhaDessai 3 years ago When a ball of cotton and a stone are dropped simultaneously, which one will fall first? or will they fall at the same time?

1. xmarioz25

Ideal conditions = they both fall at the same time, but due to resistance from air they'd change.

ya if its something very light, like a feather or something, then the stone will fall first right?

3. xmarioz25

ya

thanks

5. Mashy

but only if air resistance is considered.. most of times when that question is asked.. m sure air resistance is neglected..

6. mayankdevnani

if you neglect air resistance , like in vacuum so answer is clearly that both cotton and stone are equally fall and reach equally in the same time.

7. mayankdevnani

or when we say there is air resistance so ofcourse cotton will take time.

8. mayankdevnani

thank u soooooo much @mayankdevnani i was kind of confused with 2 answers

10. mayankdevnani

welcome...sis

11. harsh314

there are many possible conditions the cotton ball may also reach first because since you all know about air resistance and air resistance on the stone may be larger

u mean friction due to air is more on the cotton

13. mayankdevnani

yaa

14. harsh314

not cotton you told about cotton ball

15. mayankdevnani

in short, she said that. ok @harsh314

ya i mean cotton ball

17. harsh314

their is a difference between a piece of cotton, a ball of cotton, a molecule of cotton..........

18. mayankdevnani

i know...

ya u r absolutely right!!! i just forgot to add ball

20. harsh314

yes so as per the question the cotton ball is in the context so we need to know that if the ball of cotton has a greater mass and aerodynamical shape such that the density is quite low and the pressure acting on the ball is less.....,,,,,,

umm i really dont know what is aerodynamical(i'm only in the 8th)....and where pressure is concerned, i think it is the acceleretion due to gravity that matters..

22. harsh314

what do you know about air resistance

i know about friction due to air

24. harsh314

what is friction

when two things rub against each other, friction is caused

26. harsh314

yes what is resistance then.....

ummm i dont know

28. harsh314

resistance means oppostion so in simple terms air resistance is the opposition of air to any moving particle.......such that it obstructs its motion.....

29. harsh314

you got somthing

so r air resistance n friction the same?

31. harsh314

see friction and air resistance are not identical i cant explain much because it will not be clear to you .

umm ohk

33. harsh314

understand it like this: when any body falls from through air the particles of air collide with it as when throw a ball in water then the particles of water collide with that ball ........similarly assume about air.

34. harsh314

hence when particles collide so the motion of the ball is obstructed tnd that is the air resistance........got it

i'm getting it a bit

ok now i understood

thanks

38. harsh314

mention not no problem is the always ready is the ..................good to see is the you are studying is the ,.,,,,,,,,,,,,, best of luck is the dear sis ...........

what is this "is the" thing?

40. harsh314

F.I.R sab tv pe ata hai.......

41. mayankdevnani

hahahahaha tum bhi @harsh314

oh ya i used to watch that...gopi right?

43. mayankdevnani

right!!! gopi, gulgule many more...

44. harsh314

tumne sahi pehchana it is right is the raat ho gayi isi liye gud night is the............

ohk

46. mayankdevnani

bye...

47. amistre64

hmm, id say that they both fall at the same time, but rather have the potential to land at different times depending on other conditions :)

48. RamyaMurugesan

so under vaccuum,both ll fall at same time eh?

ya

50. RamyaMurugesan

so the resistance offered by the air is responsible fr the increase in time fr the cotton ball?