A thin washer of internal radius 5 cm and external radius of 12 cm carries a load of 15mC distributed evenly on its surface located on the Y axis. A small 7.5g sphere with a load of 3mC is placed exactly in the center. A small push is given along the axis of the washer (the x-axis) to remove it from rest. How fast will the sphere be moving when it is 2m from the center of the washer? (hint, ignore gravity and energy is conserved)

A thin washer of internal radius 5 cm and external radius of 12 cm carries a load of 15mC distributed evenly on its surface located on the Y axis. A small 7.5g sphere with a load of 3mC is placed exactly in the center. A small push is given along the axis of the washer (the x-axis) to remove it from rest. How fast will the sphere be moving when it is 2m from the center of the washer? (hint, ignore gravity and energy is conserved)