Net force that is required to bring the car to a halt =6400 N
Explanation:
Using kinematic equation to calculate the acceleration a
Vf²= Vi²+ 2 a d
Vf= final velocity=0
Vi= initial velocity= 20 m/s
a= acceleration
d= distance=50 m
0²= (20)²+ 2 a (50)
a=-4 m/s²
Now force= F = ma
m= mass= 1600 kg
F= 1600 (-4)
F=-6400 N
negative sign indicates that the force is opposing the motion of the car.
