What happens to gravitational potential energy as a roller coaster moves down a hill?
it remains constant.
it increases.
it is converted to kinetic energy.
it is converted to elastic potential energy.

1. a net force of 100 newton’s is applied to a wagon for 5 seconds. this causes the wagon to undergo a change in momentum of

As the distance from a magnet increases, what happens to the magnet force?

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.