22 A ball is dropped onto a floor. Its speed just before hitting the floor is 3.0 m/s. Which change would result in a speed of 6.0 m/s just before hitting the floor? Ignore any effects due to air resistance. A Drop the ball from double the height above the floor. B Drop the ball from four times the height above the floor. с Use a ball with double the mass. D Use a ball with four times the mass.
