Question

Эскалатор метро движется со скоростью 0.8 м /с. Найти время за которое пассажир переместится на 40м, если он сам идёт в направлении движения со скоростью 0.2 м/c

Answer 1

0,8+0,2=1 м/с - скорость общая
40:1=40 секунд

Answer 2

40 секунд.
....................

Answer 3

Calculation of Time for Passenger to Move 40m on an Escalator

To find the time it takes for a passenger to move 40m on an escalator while walking in the direction of the escalator's movement, we can use the formula:

Time = Distance / Relative Speed

Given: - Speed of the escalator (E) = 0.8 m/s - Speed of the passenger walking (P) = 0.2 m/s - Distance to be covered (D) = 40m

We need to calculate the time it takes for the passenger to cover the distance of 40m.

Using the formula, we have:

Time = Distance / Relative Speed

The relative speed is the difference between the speed of the passenger and the speed of the escalator:

Relative Speed = Speed of the passenger - Speed of the escalator

Substituting the given values:

Relative Speed = 0.2 m/s - 0.8 m/s = -0.6 m/s

Since the relative speed is negative, it means that the passenger is moving in the opposite direction of the escalator's movement.

Now, we can calculate the time it takes for the passenger to cover the distance of 40m:

Time = Distance / Relative Speed = 40m / (-0.6 m/s)

Calculating the value:

Time = -66.67 seconds

Therefore, it would take approximately 66.67 seconds for the passenger to move 40m on the escalator while walking in the direction of the escalator's movement with a speed of 0.2 m/s.

Please note that the negative sign indicates that the passenger is moving in the opposite direction of the escalator's movement.