Question

An object is in free fall. After 10 seconds calculate the distance fallen?

*
A. 8m
B. 39.24m
C. 9.81m
D. 490.5m
E. 313.92

Answer 1

`D.490.5\ m`

Step-by-step explanation:

`We\ are\ given\ that,\\Acceleration\ due\ to\ gravity\ (On\ Earth)=9.81\ m/s^2\\Initial\ Velocity\ of\ the\ body=0\ m/s\\Time\ taken=10\ seconds\\Hence,\\From\ the\ Second\ Equation\ of\ Motion:\\S=ut+(1)/(2)at^2\\By\ reconstructing\ the\ equation:\\S=ut+ (1)/(2)gt^2\\Hence, here\\S=0*10+(1)/(2)*9.81*10^2\\S=(1)/(2)*981\\S=490.5\ m`