## Physics (10th Edition)

a = $\frac{v-u}{t}$ For both rifles, u=0 thus a = $\frac{v}{t}$ Let $a_{short}$ = $\frac{v_{short}}{t_{short}}$ Let $a_{long}$ = $\frac{v_{long}}{t_{long}}$ Since $v_{short}$ > $v_{long}$ and $t_{short}$ < $t_{slong}$, $a_{short}$ > $a_{long}$