Say that there were a planet x in our solar system with a mass 1/4 the mass of earth and a radius 1/2 the radius of earth. how will the gravity on its surface compare to the surface gravity of earth?

The gravity on the surface of the planet X will be equal to the gravity on the surface of the Earth.

Explanation:

The gravity (g) on the surface of a planet can be calculated using an expression derived from Newton's law of universal gravitation.

where,

G: gravitational constant

M: mass of the planet

r: radius of the planet

The gravity on the surface of the Earth is:

For the planet X,

mX = 1/4 mE

rX = 1/2 mE

The gravity on the surface of the planet X is:

The gravity on the surface of the planet X will be equal to the gravity on the surface of the Earth.

answer; equivalent to a one(1) horsepower motor;