Answer: 6.22 N(the units have been mentioned wrongly in the question)
Given:
mass of the ball(m)=0.42 Kg
acceleration of the ball(a)=14.8m/s^2
F=mxa
Where m is the mass of the ball.
a is the acceleration of the ball.
F is the force applied on the ball.
F=0.42 X 14.8
F= 6.26 N