Question

Need Help . ...

Calculate centripetal acceleration & centripetal force on a man whose mass is 80kg who is resting on the ground at the Equator.

Answer 1

as we know,
Centripetal acceleration = V^2/r

and
Centripetal force = mv^2/r

Answer 2

value of r will be is 6.4^*10^6 m in this case

Answer 3

how to find the V ... ?

Answer 4

how is that we arent flooting?
how is that we are held by earth giving us centripoetal accleration?

Answer 5

floating*

Answer 6

dont know

Answer 7

haerd of apple falling on newton because of GRAVITY?

Answer 8

lol.. yeah..

Answer 9

so?
that garvitationa force provides centripetal acceleration

Answer 10

hey how can u equate accleration(g) with velocity?

Answer 11

gravitational force =GMm/r^2

Answer 12

after that ?

Answer 13

equate
GMm/r^2=mv^2/r

Answer 14

u understood why i equated both?

Answer 15

No, I didnt understand
can you explain further please

Answer 16

in physics,
when u say a body is accelerating in nature without u giving any accelartion,
then that accleartion should have been provided by some external agency here in this case there is gravitational force acting between the earth and man which provides the centripetal force required for him to stay on earth

*IMPORTANT: you shud always equate same quantities like
accleration with acceleration
velocity with velocity
force with force

what we are doing above is equating force with force

Answer 17

ok,
then what will er get after equating them. ?

Answer 18

we*

Answer 19

u get value of centripetal force directly=GMm/r^2
then divide it my massm to get value for centripeta acceleration
as force=mass*accelaertaion

Answer 20

Sorry, I am still not getting the correct answer,

can you solve for that ?

Answer 21

117373650919.5408*10^7 is centripetal acceleration
or
1.173*10^18

Answer 22

but the correct answer i'm provided is 0.0338m/s^2

how did you get that ?

Answer 23

GMm/r^2

put everything in s.i units
then the answer wat u wrote is acceleration to get is divide by mass(80)

G=6.011*10^-11
M=6*10^24
R=6.4*10^6
m=80

Answer 24

let me check

Answer 25

Why I'm not getting you answer using my calculator :D ?

Answer 26

your*

Answer 27

u understood the concept right ? do it slowly.......MY ANSWER MAY NOT BE RIGHT!

Answer 28

ok , will check it later. now gotta go for class .)

and you please check your answer too, if you're free..

Answer 29

ok