In a large thunderstorm cloud, collisions between ice crystals moving upwards, and soft hail (called graupel) which is either stationary or moving downwards, creates a separation of charge. In such clouds there is a large negative charge near the middle/lower portion of the cloud, and this causes the ground to become positively charged. The electric field produced by this can be as large as 10,000 Vlm. You have a baseball with mass 144.4 9. By rubbing the ball on your hair, you give it a negative charge of 8,600 nC. You go outside while a thundercloud is passing overhead and throw the ball straight up with an initial speed of 12.6 m/s. Using sophisticated timing equipment, you notice that the time it takes to go up and return to its original position is 0.25 percent faster than if there is no charge on the baseball. What is the electric field near the ground ? Number V/m