To be truthful i'm really tired right now and do not feel like searching for this answer so!

According to Newton's 2nd law, if the net force applied on an (moving) object increases then the acceleration proportionately increases, according to force equals the mass multiplied by the acceleration, (Force = Mass × Acceleration). Mass is held constant

Explanation:

Newton's second law states that the acceleration, a, at which an object moves is directly proportional to the net force, F, applied on the object and is inversely proportional to the mass, m, of the object

Mathematically, we have;

a ∝ F, and a ∝ 1/m

Therefore;

According to Newton's 2nd law, if the net force applied on an (moving) object increases then the acceleration proportionately increases, according to force equals the mass multiplied by the acceleration, (Force = Mass × Acceleration). Mass is held constant

the doppler effect is used by weather forecasters to measure 

moving clouds