Question

a body weighs 700g weight on the surface of the earth .how much will it weigh on the surface of a planet whose mass is1/7 and radius is half that of the earth​

Answer 1

Answer:

weight of 700g of a body on a planet whose mass is 1/7 of that of earth and radius 1/2 of earth

=( 700g×(1/7)/(1/2)²=400gf

PLEASE MARK AS BRANLIEST.

Answer 2

Answer:

The weight of the body on the surface of a planet is 400 g.

Explanation:

Given that,

Weight of body = 700 g

Mass of the planet is one by seven of the mass of the earth.

Radius of the planet is half of the radius of the earth.

We need to calculate the gravity of the planet

Using formula of gravity

$g=\dfrac{GM}{R^2}$

Gravity of the planet is

$g_{p}=\dfrac{\dfrac{GM}{7}}{\dfrac{R^2}{4}}$

$g_{p}=\dfrac{4}{7}g$

We need to calculate the weight of the body on the surface of a planet

Using formula of weight

$W= mg_{p}$

Put the value into the formula

$W=700\times\dfrac{4}{7}$

$W=400g$

Hence, The weight of the body on the surface of a planet is 400 g.