Answer:

From the options itself it is clear that only in option C, when you add PE and KE i.e 2E

o

+(−E

o

) we get E

o

Now

Total energy E

o

=P.E+K.E=

R

−GMm

+

2

1

mv

2

When we substitute v=

R

GM

in K.E, we have K.E=

2R

GMm

∴

R

−GMm

+

2R

GMm

=E

o

⇒

R

−GMm

=2E

o

So, P.E=

R

−GMm

=2E

o

and K.E=

2R

GMm

=−E

o

Answer:

artificial satellite moving in a circular orbit around the Earth has total mechanical energy as E . It's kinetic energy will be ?