To find the mass of the object, you can use the formula for momentum:
\[ \text{Momentum} = \text{mass} \times \text{velocity} \]
Given that the momentum is 100 kg⋅m/s and the velocity is 5 m/s, we can rearrange the formula to solve for mass:
\[ \text{mass} = \frac{\text{Momentum}}{\text{Velocity}} = \frac{100 , \text{kg⋅m/s}}{5 , \text{m/s}} = 20 , \text{kg} \]
Thus, the mass of the object is 20 kg.