Final answer:
The mass of the ball is calculated using the momentum and velocity, resulting in a mass of 14 kg.
Step-by-step explanation:
To find the mass of the ball, we can use the formula for momentum, which is momentum (p) = mass (m) × velocity (v). Given that the momentum of the ball is 98 kg·m/s and the velocity is 7.0 m/s, we can rearrange the formula to solve for mass:
m = p / v
Substituting the given values,
m = 98 kg·m/s / 7.0 m/s
m = 14 kg
Therefore, the mass of the ball is 14 kilograms.