Hich of the following characteristics is common to both acids and bases? they produce ions when dissolved in water they absorb oxygen ions when dissolved in water they increase hydrogen ions when dissolved in a solution they increase the hydroxide ions when dissolved in a solution

Olympic skier tina maze skis down a steep slope that descends at an angle of 30∘ below the horizontal. the coefficient of sliding friction between her skis and the snow is 0.10. i found maze's acceleration which is 4.1 m/s^2. but how do you determine maze's speed 4.0 s after starting?