Question

satellite of mass m is revolving round the earth at a height R above the surface of earth. If g is gravitational acceleration at surface of earth and R is radius of earth then magnitude of momentum of satellite is k​

Answer 1

Answer:

At a height h, acceleration due to gravity be g

′

As, g

′

=g(1+

R

h

)

−2

Now, for h=R,⟹g

′

=

4

g

potential energy, P.E=−

(R+h)

GMm

, and g

′

=

(R+h)

2

GM

⟹P.E=−mg

′

(R+h)

For h=R,P.E=−m×

4

g

×2R

Thus, P.E=−

2

mgR