Need Help With a Physics Question (Force)

Hi could someone please show me how to solve this problem?
A car with a mass of 1500 kg is traveling at 25 m/s. The driver slams on the brakes and stops in 4.0 s. What was the force required to stop the car?

Do you know SUVAT equations? u is initial velocity, v is final velocity, a is acceleration and t is time.

Use SUVAT to calculate the deceleration of the car.

v = u + at

0 = 25 + a x 4
-25 = 4a
a= -25/4 = - 6.25 (it's decelerating)

Newton's laws state that F=ma (force = mass x acceleration)

F = ma = 1500 x 6.25 = 9375 Newtons

force x time interval = mass x change in velocity..........P x dt = m x dv

make sure all items have consistent units.

F/dt = m dv the ds are delta or change in...

x/4 = 1500*25

x = 1500 * 100

x = 150000 N