This cab be solve using Newtons second law of motion :
F = ma
Where F is the force applied
A is the accelaration = v/s
V is the velosity
S is the time
M is the mass
F = (2100 kg)*( 96km/hr)( 1000m/ 1km)( 1 hr/3600 s) / 3.5 s
F = 16000 N is the force applied
