Answer:
By the force of universal attraction
Explanation:
The gravitational attraction of a large body (planet) on an object on its surface can be calculated with the same equation of universal gravitation
F = G m1 m2 / r²
Where G is the Universal gravitation costing 6.67 10⁻¹¹ N m²/Kg², m1 the mass of the planet, r the distance that we can take equal to the average radius of the planet and m2 the mass of the object that we can leave out, what remains of the equation is called acceleration of the planet's gravity, let's write the equation explicitly
g = G m1 / r²
We look for the data of the two planets, for the earth, they are 5.98 10²⁴ kg and 6.37 10⁶ m for their mass and radius, respectively; for Uranus we have 8.68 10²⁵ Kg and 2.54 10⁷ m; Let's calculate the values of the acceleration of gravity for each
Earth
g = 6.67 10 -11 5.98 10 24 / (6.37 10 6) 2
g = 9.87 m / s
Uranus
g2 = 6.67 10 -11 8.68 10 25 / (2.54 10 7) 2
g2 = 8.97 m / s
We can see that the gravity of Uranus is less than the gravity of the earth.
This could be intuited since the force of gravity depends on the inverse of the square of the distance and only proportionally with the mass.
