A ball rolls at a speed of 4 km/h toward the back of a bus traveling forward at a speed of 35 km/h. What is the magnitude of the ball’s velocity relative to the ground? *

Choose the correct general statement concerning the total potential and kinetic energy at any point along the arc of swing. the total energy at any point along the arc of swing of the pendulum is always less than 12 joules. the total energy at any point along the arc of swing of the pendulum is always more than 12 joules. the total energy at any point along the arc of swing of the pendulum is always equal to 12 joules. not enough information to determine