To solve this problem we will apply the concepts related to the momentum.
This is defined as the product between the change in velocity and the mass of the object, that is
[tex]p = m\Delta v[/tex]
[tex]p = m (v_f-v_i)[/tex]
Where,
m = mass
[tex]v_f =[/tex] Final velocity
[tex]v_i =[/tex] Initial velocity
Our values are given as,
m = 14kg
[tex]v_i[/tex]= 11m/s
[tex]v_f= - 5m/s \rightarrow [/tex] the negative Symbol implies that the direction is opposite to the initial one and therefore there is also a change in the sense of magnitude
[tex]p = (14)(-5-11)[/tex]
[tex]p = 14(-16)[/tex]
[tex]p = -224 kg \cdot m/s[/tex]
The negative symbol indicates that the momentum has a direction opposite to that of the initial velocity. Or failing that, it has the same direction of the final speed
