A body of mass 100 kg falls on the earth from infinity. What will be its velocity on reaching the earth? What will be its K.E.. ? Radius of the earth is 6400 km and g=9.8 ms^(-2). Air friction is negligible.

A body of mass 100 kg falls on the earth from infinity. What will be i

1.	A body of mass 100 kg falls on the earth from infinity. What will be its velocity on reaching the earth? What will be its K.E.. ? Radius of the earth is 6400 km and g=9.8 ms^(-2). Air friction is negligible.
Answer» ANSWER :`11.2 KMS^(-1),6.27xx10^(9)`J