12. Two 4000-kg passenger cars roll without friction (one at 2 m/s, the other at 4 m/s) toward each other on a level track. They collide, couple, and roll away together with a combined momentum of?
a.) zero.
b.) 4000 kg m/s.
c.) 8,000 kg m/s.
d.) 16,000 kg m/s.

The objects do not reach terminal velocity         there is not enough time from the time the object falls from when it hits the ground to achieve terminal velocity. an object must be placed higher to achieve terminal velocity in order to be in free fall.

Iassume the answer is 75 feet. inwards to outwards rather than outwards to inwards. probably be 75.hachures are stokes drawn in direction of the steepest slope. a series of short parallel lines drawn on a map to indicate topographic relief. it is actually called hachures on contour lines. the small marks in the center of the feature are called hachures.observe the picture attached