A950 kg car is initially moving at 95 km/hr

Mass of the car is 950 kg and therefore the weight of the car is 9500 N. 
The initial speed of the car is 95 km/hr 
Converting this to m/s 
   95 × 1000/3600 = 26.39 m/s
 To calculate the resultant force after collision we subtract the stopping force from the weight of the of the car.
Resultant force = 9500 N - 3860 N
                         = 5640 N
Then we can calculate the power,
                    power = force multiplied by distance then divided by time
        this is equivalent to force multiplied by velocity ( distance divided by time),
Therefore power = force × velocity
 stopping power will therefore be 5640 N × 26.39 m/s = 148839.6 watts
                                
Hence the stopping power is 148839.6 Watts or 148.839 kilo watts