Answer :
The acceleration of the planet b is inversely proportional to the square of the radius.
What is acceleration due to gravity ?
Acceleration owing to gravity is the term used to describe the acceleration of freely falling bodies caused by the force of attraction of the other body. For a specific attracting body at a specific location, it is a constant number. The average acceleration caused by gravity for objects on or near the surface of the earth is 9.8 m/s2.
Every particle in the cosmos attracts every other particle with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between their centers, according to Newton's law of universal gravitation.
To know more about gravity you may visit the link:
https://brainly.com/question/21454806
#SPJ4
