Question

3 multiple answer 2 points which formula(s) will you use? $v = \frac{d}{t}$ $a = \frac{v_f - v_i}{t}$ $v_f^2 = v_i^2 + 2ad$ $d = v_i \cdot t+\frac{1}{2}at^2$

Explanation:

These are all common kinematic formulas in physics. The first formula $V=\frac{d}{t}$ is for average - velocity calculation where $V$ is velocity, $d$ is displacement and $t$ is time. The second formula $a = \frac{V_f - V_i}{t}$ is for acceleration calculation with $a$ as acceleration, $V_f$ as final velocity, $V_i$ as initial velocity and $t$ as time. The third formula $V_f^{2}=V_i^{2}+2ad$ relates final velocity, initial velocity, acceleration and displacement. The fourth formula $d = V_i\cdot t+\frac{1}{2}at^{2}$ gives displacement in terms of initial velocity, time and acceleration.

Answer:

All of the above formulas can be used depending on the given information and what is being solved for in a kinematics problem. So the answer is:

• $V=\frac{d}{t}$
• $a=\frac{V_f - V_i}{t}$
• $V_f^{2}=V_i^{2}+2ad$
• $d = V_i\cdot t+\frac{1}{2}at^{2}$