The same amount of force is applied to two bowling balls. one of the balls weighs 8 pounds and the other weighs 13 pounds. which ball will have greater acceleration"

f=ma where f is the force/N, m is the mass/kg and a is the acceleration/ms-2

Rearranging, we can solve for acceleration, a=f/m
the mass is the divisor of the force which will give us the acceleration - therefore we know the magnitude of the acceleration will be lower for a heavier object being supplied the same net force as a lighter one. Therefore, the 8 pound ball will have the greater acceleration.

Rain is pulled by gravity which is a non contact force