Additional Problems (Problem 77)

(a) Find an equation to determine the magnitude of the net force required to stop a car of mass m, given that the initial speed of the car is $v_0$ and the stopping distance is x. (b) Find the magnitude of the net force if the mass of the car is 1050 kg, the initial speed is 40.0 km/h, and the stopping distance is 25.0 m. Select the answer to part (b).