Answer:
-2000 N
Explanation:
To solve the problem, we can use the impulse theorem, which states that the impulse is equal to the change in momentum of the car:
[tex]I = \Delta p\\F \Delta t = m \Delta v[/tex]
where
F is the average breaking force
[tex]\Delta t = 5 s[/tex] is the stopping time
m = 1000 kg is the mass of the car
[tex]\Delta v = -10 m/s[/tex] is the change in velocity of the car
Solving the equation for F,
[tex]F=\frac{m \Delta v}{\Delta t}=\frac{(1000 kg)(-10 m/s)}{5 s}=-2000 N[/tex]
