Basing on Newton's second law of motion, if the force on an object is 20N and its mass 5 g, what is its acceleration?

According to Newton's second law of motion, acceleration of the object is directly proportional to the net force in the object. It is expressed as:

F = ma

where F is the net force, m is the mass of the object and a is the acceleration.

20N = 5/1000 kg (a)

a = 4000 m/s²