Answer
$v_{iA}
Work Step by Step
A: $30^o$ B: $60^o$ While both balls travel the same horizontal distance, ball B travels a greater vertical distance. Therefore, for ball A and B to have the same range, the initial velocity of ball B will be greater. If it is the same as ball A, it will not travel as far horizontally. Time in the air depends on vertical distance travelled because only the force of gravity acts on the balls. Therefore, ball B will also be in the air for the longest time.
