Question

when an object falls freely to the ground its acceleration is uniform give reason​

Answer 1

Answer:

it is because and upward force is exerted on it due to the friction with the atmosphere and the upthrust exerted on the body by the atmosphere.

Explanation:

Answer 2

Answer:

consider three points a ,b and c

at point a

PE=mgh

U=0

KE=0

TE=PE+KE

TE=mgh+0

TE=mgh

At point b

PE=h-x

u=0

using v^2-u^2=2as

v=under root2g(h-x)

as a=g

s=h-x

KE=1/2mv^2

KE=1/2m2g(h-x)

KE=mg(h-x)

PE=mgx

TE=PE+KE

TE=mgh

AT point c

KE=mgh

PE=0

TE=mgh

Explanation: