JEE Advanced 2019 Paper 2, Question 9
A ball is thrown from ground at an angle with horizontal and with an initial speed . For the resulting projectile motion, the magnitude of average velocity of the ball up to the point when it hits the ground for the first time is . After hitting the ground, the ball rebounds at the same angle but with a reduced speed of . Its motion continues for a long time as shown in figure. If the magnitude of average velocity of the ball for entire duration of motion is , what is the …