Question

two planets have radii r and 2r and denisities d and 4d. the ratio of their acceleration due to gravities is
plzzz answer fast.its urgent

Answer 1

Hey,

Acc due to gravity at the surface of planet = g = (4/3) GRλp

Planet 1; R = R
p = d

so, 
g1 = (4/3) GRλd.....(i)

planet 2 ; R = 2R
p = 4d
so, 
g2 = (4/3) G2Rλ4d...(ii)

now divide equation (i) by (ii),we get
g1/g2=1/8

ratio will be 1:8

HOPE IT HELPS:-))

Answer 2

hey here is your answer...........

when a body covers equal distances in equal interval of time then it is said uniform motion

when a body cover unequal distances in equal interval of time then it is said to be non uniform motion.

hope it is helpfulAnswer:

Explanation:hey here is your answer...........

when a body covers equal distances in equal interval of time then it is said uniform motion

when a body cover unequal distances in equal interval of time then it is said to be non uniform motion.

hope it is helpful