The united states and south korean soccer teams are playing in the first round of the world cup. an american kicks the ball, giving it an initial velocity of 3.6 m/s. the ball rolls a distance of 5.0 m and is then intercepted by a south korean player. if the ball accelerates at −0.50 m/s2 while rolling along the grass, find its velocity at the time of interception.

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?