A 2000 kg car is in neutral ( not using gas or brakes, just rolling) at an initial height of 5 meters with a speed of 10 meters per second. it rolls down a hill, losing no energy to external forces. Consider friction and inertia within the wheels to be negligible. What should be the speed at the bottom of the incline?

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples