We are asked to determine the impulse of a dog given the change in velocity. To do that we will use the following formula:
[tex]I=p_2-p_1[/tex]This means that the impulse is the change in momentum. Now, we use the formula for momentum:
[tex]p=mv[/tex]Where "m" is the mass and "v" the velocity. Now, we substitute in the formula for impulse:
[tex]I=mv_2-mv_1[/tex]Now, we take "m" as a common factor:
[tex]I=m(v_2-v_1)[/tex]Now, we substitute the values:
[tex]I=(24kg)(9\frac{m}{s}-4\frac{m}{s})[/tex]Solving the operation:
[tex]I=120kg\frac{m}{s}[/tex]Therefore, the impulse is 120 kgm/s
