To find the acceleration of the object, we can use the formula for acceleration \( a \):
\[ a = \frac{v_f - v_i}{t} \]
Where:
- \( v_f \) is the final velocity (50.0 m/s),
- \( v_i \) is the initial velocity (20.0 m/s), and
- \( t \) is the time (5.0 seconds).
Now, plug in the values:
\[ a = \frac{50.0 , \text{m/s} - 20.0 , \text{m/s}}{5.0 , \text{s}} = \frac{30.0 , \text{m/s}}{5.0 , \text{s}} = 6.0 , \text{m/s}^2 \]
Thus, the acceleration of the object is \( \boxed{6.0 , \text{m/s}^2} \).