prove that this force Con serve d ar fexxy=2a (x-y)i -a (2x+ys

One day, you are driving your car down the highway, and you notice that you are driving well over the speed limit. You apply the brakes of the carapplying a variable stopping force, until the car slows down to a rea sonable speed of 22.4 m/s (50 mph)A computer plots the force versus time for the vehicle and then measures the area under the curve. It is found that the area is - 18.950N . The total breaking time was 5.4 s. Given that the combined mass of you and your car 1sm = 1200 kg how fast were you moving before applying the breaks? What is the average force applied by the road to the car during breaking? (Note: 1Ns=1kg* m/s)

Can you please help witht the attached? thanks!

Three forces F, = 200455° , F,=180275° , F,=2502 – 80° are in Newtons. Find the resultant of these forces in polar form. [magnitude to the nearest whole number and angle to the nearest whole degree]