Question

A body weighs 5.6kgwt on the surface of the Earth.How much will be it's weight on a planet whose mass is 1/7th mass of the Earth and radius twice that of Earth's radius.​

Answer 1

Answer:

0.2 N

Explanation:

Mass of Earth = M

Mass of unknown planet = M' = M/7

Radius of earth = R

Radius of unknown planet = R' = 2R

Acceleration due to earth's gravity = g

Acceleration due to unknown planet's gravity = g'

Acceleration due to gravity at unknown planet is

g' = GM'/R'²

= G (M/7) / (2R)²

= GM/(28 R²)

= g/28

Mass of body = 5.6 / g

Weight of body on unknown planet

= mg'

= 5.6/g × g/28

= 0.2 N

Answer 2

Answer:

Hey mate plzz refer to the attachment