The planet Krypton has a mass of 7.6 * 1023 kg and radius of 1.7 * 106 m. What is the acceleration of an object in free fall near the surface of Krypton? The gravitational constant is 6.6726 * 10-11 N · m2 / kg2. Answer in units of m/s 2.

17.55 m/s²

Explanation:

Parameters given:

Mass of Krypton, M = 7.6 * 10^23 kg

Radius, R = 1.7 * 10^6 m

Gravitational constant, G = 6.6726 * 10^ (-11) Nm²/kg²

Acceleration due to gravity of planet of mass M is given as:

g = GM/R²

Since the object is close to the surface of Krypton, we can say that the distance from the Centre of Krypton is the radius of the planet Krypton.

Therefore,

g = (6.6726 * 10^ (-11) * 7.6 * 10^23) / (1.7 * 10^6) ²

g = 17.55 m/s²