BRAINLIEST WILL BE MARKED FOR THE FIRST ANSWER A body weighs 800 N on earth. Find its weight on a planet whose mass is half of
earth’s mass and radius is twice as earth’s radius. (Take g of earth as 10 m/s2
)

The weight of the body in the new planet is 100 newtons.

Explanation:

From Newton's Law of Gravitation we find that gravitational force is directly proportional to mass of the planet and inversely proportional to the square of its radius. From this fact we can build the following relationship:

(1)

Where:

, - Gravitational force, measured in newtons.

, - Mass of planet, measured in kilograms.

, - Radius of the planet, measured in meters.

If we know that , and , then the expected gravitational force in the new planet is:

The weight of the body in the new planet is 100 newtons.

it doesn't. it was imagined up in the middle ages.

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west