Question

A baseball hit by a bat with an average force of 1000 N accelerates at 4.0 x 10³ m/s².

What is the ball’s mass?

Answer 1

$$F=ma,$$ $$m=\dfrac{F}{a}=\dfrac{1000\ N}{4.0\times10^3\ \dfrac{m}{s^2}}=0.25\ kg.$$