the acceleration due to gravity on planet X is one fifth that on the surface of the earth. If it takes 3.5s for an object to fall a certain distance from rest on earth, how long would it take to fall the same distance on planet X?

Question

anonymous · Answer

booooooooooo

anonymous · Answer

http://openstudy.com/study#/updates/5234ec34e4b0af32a079286c help me out :P hah

***[isuru]*** · Answer

on earth,
S = ut + 1/2 at^2

S =displacement
u = initial velocity
a = gravitational acceleration
t = time

 S = 1/2 at^2
 S = 1/2*7/2*7/2*a
 a = 8S/49

On Planet X 
   a = 1/5 * 8S/49

S = ut + 1/2at^2
S = 1/2 * 8S/(49*5) * t^2
t^2 = 49*10/8
t^2 = 61.25
t = 7.82 s

Hope this will help ya out!!

anonymous · Answer

Omg that you so much :) I've been working on this for hours -.-