Question

A constant force of 12.5 N acts on a body for 2 sec. Find the change in momentom

Answer 1

F = 12.5 N

t = 2 sec

F = $\frac{m(v-u)}{t}$

12.5 = $\frac{m(v-u)}{2}$

$12.5 *2$ = mv - mu

$\huge\boxed{25 = mv - mu}$

Answer 2

F = 12.5 N

t = 2 sec

F = $\frac{m(v-u)}{t}$

12.5 = $\frac{m(v-u)}{2}$

$12.5 \times 212.5 \times 2 = mv - mu$

$\huge\boxed{25 = mv - mu}$