A(n) 2153 kg car is coasting along a level

road at 34.4 m/s. A constant braking force
is applied, such that the car is stopped in a
distance of 61.8 m.
What is the magnitude of the braking force?
Answer in units of N

1 answer

s = 34.4t - 1/2 at^2 = 61.8
v = 34.4 - at = 0

solving for a, a = 9.57 m/s^2

So, now you know that F=ma