contestada

Two passengers are on a moving sidewalk at the airport. Passenger A is
standing still while passenger B is walking with a speed of 2.0 km/h. The
sidewalk is moving west at a speed of 1.5 km/h. From the perspective of
passenger B, what is the speed of passenger A?

Respuesta :

rafaleo84

Answer:

V = - 2[m/s]

Explanation:

This is a classic problem of relative velocities, in order to solve it we must understand each of the velocities, given in the initial data of the problem.

VA = velocity of passenger A, = 1.5[km/h], it is the same velocity of the sidewalk

VB = 2 + 1.5 = 3.5 [km/h], that is the velocity observed by a person outside from the sidewalk.

And from the perspective of passenger B the speed of passanger A is:

VA-VB = - 2 [m/s]

It means that the passenger B is seen how passenger A is getting close to him and then passed.

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