Starting from the definition of constant acceleration, $a = \frac{v_f - v_0}{t}$, the first step to solve for $v_f$ is to Select the first stepA.multiply both sides by $t$B.subtract $v_0$ from both sidesC.divide both sides by $t$D.add $v_0$ to both sidesSelect the first step. After that, the next step is to Select the second stepA.multiply both sides by $v_0$B.add $v_0$ to both sidesC.divide both sides by $a$D.subtract $v_0$ from both sidesSelect the second step.

After performing these two steps, the resulting first kinematic equation is $v_f =$ Select the equationA.$v_0 \cdot a \cdot t$B.$v_0 + a \cdot t$C.$v_0 - a \cdot t$D.$a \cdot t - v_0$Select the equation.

This derivation is only valid when the acceleration is Select a conditionA.constantB.zeroC.increasingD.decreasingSelect a condition. If this condition were not met, the simple algebraic rearrangement used above would not yield a correct expression for velocity as a function of time.