The driver of a three - wheeler moving with a speed of 36 km/hr sees a child standing in the middle of the road and brings his vehicle at rest in 0.4 s just in time to save the child. The average retarding force on the vehicle is (The mass of the three - wheeler is 400 kg and the mass of the driver is 65 kg).

Options

A. `1.2xx10^(3)N`
B. `1.2xx10^(4)N`
C. `1.2xx10^(5)N`
D. `1.2xx10^(6)N`

Answer

B