Answer:
The maximum speed of car will be 20.5m/sec
Explanation:
We have given mass of car = 1100 kg
Radius of curve = 82.3 m
Static friction 
We have to find the maximum speed of car
We know that at maximum speed centripetal force will be equal to frictional force 

So the maximum speed of car will be 20.5m/sec
Answer:
It should be 1,029.105 m³
But I think you can ignore the 105 because it essentially doesn't make a difference
So velocity=displacement/time and force=mass*acceleration. Both objects have the same acceleration because the amount of time doesn’t play a role in the equation. Momentum equation is p=mv so only the mass and overall velocity matter. Therefore, the answer is c because time is not a variable
The momentum after collision is given by (m1+m2)v where m1 is the mass of car A, m2 us the mass of car B while v is the common velocity after collision.
Therefore, momentum=(2000+4000)5=30000kgm/s to the right.