Total kinetic energy before and after truck-car collision

[iNarb]

Homework Statement

The truck of mass 3000Kg, moving at 5.0m/s on a level on a level, icy road, bumps into the rear of a car moving at 2.0m/s in the same direction. After the impact the truck has a velocity of 3m/s and the car a velocity of 6m/s both forward. Calculate the total kinetic energy before and after the collisioin

Homework Equations

Dont know the equation

The Attempt at a Solution

 

[amy andrews]

Well, the equation for kinetic energy is 1/2 mv^2.
This is a relatively simple equation to use; for total kinetic energy you must calculate the KE for each body involved.
However, since in this problem the mass of the car isn't given, you'll probably have to find that first (hint: what conservation law involves mass and velocity?).
Hope this helps!