Answer :
Both the cars A as well as car b has zero speed after the impact.
Car b is stopped at the light when car a is crashes into it which is moving with a speed V the coefficient of restitution is given to be zero.
Because the coefficient of restitution is zero it means that the collision is perfectly inelastic in nature.
So, if the car a was moving with a speed v.
As it is already mentioned that after the collision ka bi has come to rest Swasthya the impact the speed of car b is new and because the collision is perfectly inelastic the speed of car a will also be zero.
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