A runner achieves a velocity of 11.1 m/s 9s after he begins. What is his acceleration? How much distance does the runner cover? Use the formula
vf- vi
a =
t

Along wire carrying a 4.2 a current perpendicular to the xy-plane intersects the x-axis at x=−1.7cm. a second, parallel wire carrying a 3.0 a current intersects the x-axis at x=+1.7cm. part a at what point on the x-axis is the magnetic field zero if the two currents are in the same direction? express your answer to two significant figures and include the appropriate units.