You can find more problems and solutions like these in the book "Practice Problems in Physics" by Abhay Kumar.
A particle moves along a straight line with a velocity given by $v = 3t^2 - 2t + 1$ m/s, where $t$ is in seconds. Find the acceleration of the particle at $t = 2$ s. practice problems in physics abhay kumar pdf
Acceleration, $a = \frac{dv}{dt} = \frac{d}{dt}(3t^2 - 2t + 1)$ You can find more problems and solutions like