Question

At what height from the surface of earth the gravitational
potential and the value of g are –5.4 × 10⁷ J kg⁻¹ and 6.0 ms⁻²
respectively ?
Take the radius of earth as 6400 km : [2016]
(a) 2600 km (b) 1600 km
(c) 1400 km (d) 2000 km

Answer 1

Answer:

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Explanation:

(a) 2600

Answer 2

Answer:

2600 km

Explanation

V = - GM/(R+h)

g =GM/(R +h)∧2

|v|/g =GM/(R +h) ×GM/(R+h)∧2

v/g =(R +h)

5.4 ×10-7/6.0 = R +h

9×10∧ 6 =6400 +h

h = 2600 km