Question

The value of acceleration due to gravity is -2 9.8 ms . Its value in -2 km min will be

Answer 1

Answer:

same as

Explanation:

Weight of an object on the ground or close to ground is w = mg ⇒w=mass X 9.8

g=9.8 ms⁻² is on the surface of the earth.

g=GM/R² ; where G is universal gravitation constant, M is mass of the earth and R is the radius of the earth.

If the object is falling from height comparable to earth radius  (6,400 Km), then object height from ground (say r) need to be considered for calculating gravity at that point.

then, g'=GM/(R+r)²

For falling object the gravity continuously decrease and becomes 9.8 ms⁻² on the surface of the earth. So, weight (w=mg') continuously decreases.

because mass (m) is constant.