You have been called to testify as an expert witness in a trial involving a head-on collision. Car A weighs 1515 lb and

[answerhappygod]

You have been called to testify as an expert witness in a trialinvolving a head-on collision. Car A weighs 1515 lb andwas traveling eastward. Car B weighs 1125 lb and wastraveling westward at 45.0 mph. The cars locked bumpersand slid eastward with their wheels locked for 21.5 ftbefore stopping. You have measured the coefficient of kineticfriction between the tires and the pavement to be 0.750.
What speed 𝑣 (in miles per hour) was car A travelingjust before the collision? (This problem uses English units becausethey would be used in a U.S. legal proceeding.)