Question

Not yet answered Points out of 2.00 Not flaggedFlag question Question text Two cars collide head-on on a level friction-free road. The collision was completely inelastic and both cars quickly came to rest during the collision. What is true about the velocity of this system's center of mass?

Answer 1

Answer:

Velocity of center of mass must be ZERO

Explanation:

As we know that two cars are moving on friction-less surface

So here we can say that on the system of cars there is no external force along x direction

So we can say that

$F_{net} = \frac{dP_{cm}}{dt}$

so here if net force is zero

$\frac{dP_{cm}}{dt} = 0$

$P_{cm} = constant$

since finally the two cars comes to rest so here final velocity of center of mass of two cars will be zero and hence it will be always zero as there is no force on the system of two cars