The acceleration of a bus is given by `a_x(t)=at`, where `a=1.2ms^-2`.
If the bus's velocity at time `t=1.0s` is `5.0ms^-1`, what is its velocity at time `t=2.0s`?

Explanation

To find the velocity of the bus at time \( t = 2.0 \, \text{s} \), we can use the given acceleration function and the initial velocity. Let's break down the solution step by step.

### Step 1: Understand the given information
We know:
- The acceleration of the bus is given by \( a_x(t) = at \), where \( a = 1.2 \, \text{m/s}^2 \).
- The initial velocity at \( t = 1.0 \, \text{s} \) is \( V_1 = 5.0 \, \text{m/s} \).
- We need to find the velocity at \( t = 2.0 \, \text{s} \).

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