7. A car is descending the hill of slope ₁ with the brakes slightly applied so that the speed v is constant. The slope decreases abruptly to 02 at point A.If the driver does not change the braking force, determine the acceleration a of the car after it passes point A in terms of 0₁ and 02. Evaluate the expression for 0₁ = 6° and 0₂ = 2°. == 01 = constant A 02