During a cold winter night a car unfortunately skids to a stop shortly before crashing into a donut shop. the skid marks are 34.0m long and the car has a mass of 825kg. from a measurement made at the time of the incident, the coeff. of friction was determined to be 0.300 how fast was the car going when the driver applied the brakes (assume that the brakes are the only resistive force that stops the vehicle)?