Question

when a body falls freely towards the earth, then its total energy are (a) Increases (b) Decreases

Answer 1

it can be said that the potential energy decreses and kinetic energy increases gradualy and become maximum when it reaches the ground

Answer 2

Answer :-

$\texttt{Your answer :- it increases}$

$\texttt{Explanation :-}$
$\texttt{As we know that Total Energy}$
$\texttt{= K.E. + P.E.}$
${= \frac{1}{2} mv^2\: +\: mgh}$

$\texttt{Then as body just started falling}$
$\texttt{ it's velocity = 0}$
$\texttt{h = H (let us assume)}$
$\texttt{and let the mass be m}$
$\texttt{then at H }$
$\texttt{K.E = 0 (as v = 0)}$
$\texttt{and P.E = mgh (maximum)}$
$\texttt{but as it starts falling}$
$\texttt{it's kinetic energy increases}$
$\texttt{ (as velocity increases)and }$
$\texttt{potential energy decreases)}$
$\texttt{(as height decreases)}$
$\texttt{but due to gravitational force }$
$\texttt{velocity increases more rapidly}$
$\texttt{therefore P.E < K.E}$
$\texttt{hence it increases}$