Momentum (Collision) Problem

First, grams needs to be converted to kg so the 15g is divided by 1000g which is one kilo.  The 15grams is then converted to 0.015kg.

To find the change in momentum, mass is multiplied by change in velocity.  The velocity is given as 600m/s and the mass was just calculated as 0.015kg.  The change in momentum is found to be 9N.m.  This is the change of the first vehicle.

Next, the other car is 100grams and should be divided by 1000grams which is one kilo to find out the car is 0.1kg in mass.

The change of velocity of both cars is next found with the equation change in momentum equals mass times change in velocity.  The change of momentum was found as 9N.m.  The two masses are added together to find the change of velocity form both cars.  Added together, the mass of 0.115kg is divided by the momentum of both cars.  Finally, the change of velocity in both cars is found as 78.26m/s.