Question

if the body is 392 Newton on the surface of earth what is the weight of this body on the height of hundred kilometre?( radius of earth equal to 6400 kilometres)​

Answer 1

Answer:

380 N

Explanation:

Acceleration due to gravity at height "h" is given as

g' = g[R/(R + h)]²

where g is acceleration due to gravity at surface of earth

Multiply both sides by mass of body "m"

mg' = mg'[R/(R + h)]²

So, weight of body at height of 100 km from surface of earth is

W' = 392 N × [6400/(6400 + 100)]²

= 392 N × (6400/6500)²

= 392 N × (64/65)²

= 380 N