Verify:
Accelerating at 5km/hr/sec to 100km/hr takes 20 seconds
After 20 seconds, the distance covered is d = .5*a*t2
a = 5km/hr/sec = 1.389m/sec2
d = .5*1.389m/sec2*(20sec)2 = 277.78m
The work performed, i.e. energy required, is
w = F*d = 694N * 277.78m = 192777Nm = 192777 joules
The average power required is
P = Dw/Dt = 192777joules/20sec = 9368.9 w = 12.9 hp
Energy/Power for accelerating the motor mass:
w = F*d = (55.52N)(277.78m) = 15422.3 joules
P = Dw/Dt = 15422.3/20 = 771w = 1.03 hp