A book is sitting on a table. jackie is pushing the book with a force of 9 N to the right. if the force of friction is 4 N to the left, what is the net force? 1. 5 N right
2. 4 N left
3. 5 N left
4. 4 N right

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.