Question

Автомобили А и Б удаляются от города от одного перекрестка по взаимно перпендикулярными дорогами . скорость автомобиля А относительно земли 80км/ч ,скорость автомобиля Б относительно земли 60 км/ч . чему равна скорость движения автомобиля Б относительно автомобиля А.

Answer 1

По теореме Пифагора:

V = √(V₁² + V₂²) = √(80²+60²) = 100 км/ч 

Answer 2

Calculation of the Relative Velocity of Car B with Respect to Car A

To calculate the relative velocity of Car B with respect to Car A, we need to consider the velocities of both cars relative to the Earth.

Given: - Velocity of Car A relative to the Earth: 80 km/h - Velocity of Car B relative to the Earth: 60 km/h

To find the relative velocity of Car B with respect to Car A, we can subtract the velocity of Car A from the velocity of Car B.

Relative velocity of Car B with respect to Car A = Velocity of Car B - Velocity of Car A

Substituting the given values: Relative velocity of Car B with respect to Car A = 60 km/h - 80 km/h

Now, let's calculate the relative velocity:

Relative velocity of Car B with respect to Car A = -20 km/h

Therefore, the relative velocity of Car B with respect to Car A is -20 km/h. This negative sign indicates that Car B is moving in the opposite direction of Car A.

Please note that the relative velocity is calculated by subtracting the velocity of Car A from the velocity of Car B.