Question

a baseball is traveling (+20 m/s) and is hit by a bat. it leaves the bat traveling (-30 m/s). what is the change in the velocity? remember that direction is what makes velocity different than speed. -10 m/s -20 m/s -30 m/s -50 m/s

Explanation:

Step1: Recall velocity change formula

The change in velocity ($\Delta v$) is calculated as the final velocity ($v_f$) minus the initial velocity ($v_i$), so $\Delta v = v_f - v_i$.

Step2: Identify initial and final velocities

Initial velocity $v_i = +20\ \text{m/s}$, final velocity $v_f = -30\ \text{m/s}$.

Step3: Calculate the change in velocity

Substitute into the formula: $\Delta v = -30 - 20 = -50\ \text{m/s}$.

Answer:

-50 m/s (the option with -50 m/s)