Final answer:
The acceleration of an object that starts from rest and reaches a velocity of 120 m/s in 2 minutes is 1 m/s².
Step-by-step explanation:
The acceleration of an object is defined as the rate of change of velocity. To calculate the acceleration of the object in the question, which starts from rest and attains a final velocity of 120 m/s in 2 minutes, we can use the formula:
\[a = \frac{\Delta v}{\Delta t}\]
where:
Since the object starts from rest, the initial velocity (\(v_i\)) is 0 m/s, and the final velocity (\(v_f\)) is 120 m/s. The time taken (\(\Delta t\)) is 2 minutes, which need to be converted into seconds to match the units of velocity. Therefore, \(\Delta t\) becomes 120 seconds.
The acceleration can now be calculated as:
\[a = \frac{120\ m/s - 0\ m/s}{120\ s}\]
\[a = 1\ m/s^2\]
So, the acceleration of the object is 1 m/s2.