Answer:
-16000 N
Step-by-step explanation:
Force: This can be defined as the product of mass of a body and its acceleration. The S.I unit of force is Newton (N). The formula of force is given as
F = ma ................................... Equation 1
Where F = Force, m = mass of the car, a = acceleration of the car.
But,
v² = u²+ 2as ................... Equation 2
Where v = final velocity, u = initial velocity, a = acceleration, s = distance.
make a the subject of the equation.
a = (v²-u²)/2s .............. Equation 3
Given: v = 0 m/s², ( brought to rest), u = 2 m/s, s = 15 cm = 0.15 m.
Substitute into equation 3
a = (0²-2²)/(2×0.15)
a = -4/0.3
a = - 13.33 m/s²
Also given: m = 1200 kg.
substitute into equation 1
F = 1200(-13.33)
F = -16000 N