Question

BRAINLIEST WILL BE MARKED FOR THE FIRST ANSWER

Answer 1

Answer:

98.4 N

Explanation:

Given that the body weighs 800 N on earth.

Thus,

Weight = mass x acceleration due gravity

i.e W = mg

800 = m x 10

m = $\frac{800}{10}$

   = 80 kg

The mass of the body is 80 kg.

To be able to determine its weight on the planet, we have to first calculate the gravitational pull of the planet.

But,

g = $\frac{GM}{r^{2} }$

Where: G is the Newton's universal gravitation, M is the mass of the planet and r is the radius of the planet.

g = $\frac{6.674*10^{-11} *2.986*10^{24} }{(12.742*10^{6})^{2} }$

  = $\frac{1.9929*10^{14} }{1.6236*10^{14} }$

  = 1.2275

g = 1.23 m/$s^{2}$

Thus,

Weight of the body on the planet = mg

                          = 80 x 1.23

                          = 98.4 N

The weight of the body on the planet is 98.4 N