Question

Select the correct answer.
Anna throws a ball horizontally off her apartment balcony at a speed of 6.0 meters/second. If the ball falls 10.0 meters from the balcony to the base of the apartment, calculate how long it takes the ball to reach the base.

Answer 1

kinematics equation
delta y = (1/2)at^2 + v_o* t

the ball is only thrown horizontally, so v_o is 0. a is the acceleration due to gravity (-9.8 m/s/s) and delta y is the vertical distance (10.0 m)

solve for t