47. A compact car, mass 875 kg, moving south at 15 m/s, is struck by a full-sized car, mass 1584 kg, moving east at 12 m/s. The two cars stick together, and momentum is conserved in the collision. a. Sketch the situation, assigning coordinate
axes and identifying "before" and "after."
b. Find the direction and speed of the wreck
immediately after the collision, remembering that momentum is a vector quantity.
c. The wreck skids along the ground and comes to a stop. The coefficient of kinetic friction while the wreck is skidding is 0.55. Assume
that the acceleration is constant. How far
does the wreck skid?
40
7