Answer:
Driver hits the dog
Explanation:
From kinematics equation
[tex]v_f^{2}=v_i^{2}+2as[/tex] and making a the subject
[tex]a=\frac {v_f^{2}-v_i^{2}}{2s}=\frac {0-20^{2}}{2*50}=-4m/s^{2}[/tex]
F=ma=800*-4=-3200 N
The driver is required to apply a force of 3200 N to effectively not hit the dog. However, when the driver applies 2000 N, this is less the required force by 1200 N hence the driver hits the dog.
