A bowling ball weighs 48 N. With what net force must it be pushed to accelerate it at 3.0 m/s2

First find the mass.

Since weight force is 48N, and acceleration due to gravity is 9.8 m/s^2,

weight force = mass*acceleration due to gravity,

mass = weight/acceleration

mass = 48N / 9.8 m/s^2

mass = 4.9 kg

Now you find the force needed to accelerate to 3.0 m/s^2.

Force = mass*acceleration

Force = 4.9kg * 3.0 m/s^2

Force = 14.7 N