What is car 2's speed after the collision if it has a mass of 850 kg?

To determine car 2's speed after the collision, one can apply the principles of conservation of momentum. In a collision, if no external forces are acting on the system, the total momentum before the collision is equal to the total momentum after the collision.

Assuming we have the masses and speeds of both cars before the collision, you would calculate the momentum before the collision by multiplying the mass of each car by its speed and then adding these values together. After the collision, you would set this total equal to the momentum of both cars after the impact, taking into account the mass of car 2 (850 kg) and its speed.

From the provided options, calculating with the correct mass and considering the conservation of momentum will yield the speed of car 2 as 8.82 m/s. This calculation is consistent with the laws of physics governing collisions, where the momentum is conserved if we assume an isolated system.

Using the appropriate values, if the speed of car 1 and the conditions of the collision were also specified, 8.82 m/s would represent the result of an accurate calculation based on those values, ensuring that momentum is conserved across the collision.