Speed A + Speed B = Speed Combined
Unless they hit each other. Then, under Newton's Third Law, it's
(Speed A + Speed B) / 2 = Combined Collision Force
IE, if two cars hit each other head-on, both going 50mph, it's the same force as a single car hitting a wall at 50mph. (i.e. The impact force does not double; because you have to divide the absorption force of a second vehicle, which cancels out half of the force)
Closing speed in a head-on collision refers to the combined speed at which two vehicles are approaching each other before impact. It is calculated by adding the speeds of both vehicles together. The higher the closing speed, the more severe the impact and potential damage.
100
When approaching a two-way stop intersection, the driver must come to a complete stop and yield to any vehicles already at the intersection or approaching from the right. The first vehicle to arrive has the right of way. If two vehicles arrive at the same time, the vehicle on the right has the right of way. Proceed through the intersection only when it is safe to do so.
There is addition of the speed.
140 mph
When approaching a four-way intersection with two stop signs, the rule is to yield to vehicles that arrive first. If two vehicles arrive at the same time, the vehicle on the right has the right of way. Come to a complete stop at the stop sign and proceed when it is safe to do so.
When approaching a two-way stop sign intersection, the driver must come to a complete stop and yield to any vehicles already at the intersection or approaching from the right. The first vehicle to arrive has the right of way. If two vehicles arrive at the same time, the vehicle on the right has the right of way. It is important to proceed with caution and only enter the intersection when it is safe to do so.
The asteroid with the greater mass will possess a greater amount of kinetic energy when approaching Earth at the same speed.
When approaching a two-way stop sign intersection, the driver must come to a complete stop and yield to any vehicles that arrived first or are already in the intersection. After yielding, the driver can proceed through the intersection in a safe manner. It is important to pay attention to other vehicles and pedestrians to ensure safe navigation through the intersection.
There is not enough information to answer the question.
When approaching a 2-way stop sign intersection, the driver must come to a complete stop and yield to any vehicles already at or approaching the intersection. The first vehicle to arrive has the right of way. If two vehicles arrive at the same time, the vehicle on the right has the right of way. It is important to proceed with caution and only enter the intersection when it is safe to do so.
The combined VELOCITY of two cars that crash will be somewhere between that of the individual cars. In this case, the combined speed will be less than the speed of the car that was moving before the crash.If you know the velocities and the masses, the exact speeds can be calculated using conservation of momentum.