Question

EXERC
Ir R is the radius of the earth and the
acceleration due to gravity on the earth's
surface, the mean density of the earth is
(1) 4G/3gR
(2) 36R/4G
A384 RG
(4) Rg/126​

Answer 1

Answer:

Increase in potential energy

ΔU=U

2

−U

1

=[−

(R+

5

R

)

GMm

]−[−

R

GMm

]

=

R

GMm

−

6R

5GMm

=

6R

GMm

=

6R

gR

2

m

=

6

mgR

=mg.

6

5h

=

6

5

mgh