Velocity and Displacement: How to Derive Expressions from Acceleration Equation

[BonBon101]

Homework Statement

The acceleration a ms^-2 of a car is given by a=18t - 4 where t is the time in seconds.Derive expressions for the velocity v ms^-1 and the displacement x m if the initial velocity and displacement are both zero

Homework Equations

The Attempt at a Solution

would really appreciate any help with this.I have no idea where to start!Trying to get a sample answer so i can study it to past exam paper questions

 

[rock.freak667]

Start with the definition of acceleration:

acceleration is the rate of change of velocity, so a= dv/dt.

If you replace 'a' by 'dv/dt' in your equation, can you find 'v'?