Question

Помогите пожалуйста решить задачу. При подходе к станции за каждую секунду скорость поезда изменилась на -0.4м/ч .На сколькоизменится скорость поезда за 25 секунд?

Answer 1

Изменится на 10м/ч
0.4*25=10

Answer 2

Problem Analysis

To solve this problem, we need to determine how much the train's speed will change after 25 seconds, given that the speed changes by -0.4 m/h every second.

Calculation

To find the change in speed after 25 seconds, we need to multiply the rate of change (-0.4 m/h) by the number of seconds (25).

Let's calculate it step by step:

1. Convert the rate of change from meters per hour to meters per second: - 1 hour = 3600 seconds (since there are 60 minutes in an hour and 60 seconds in a minute) - -0.4 m/h = -0.4 m/3600 s ≈ -0.000111 m/s

2. Multiply the rate of change by the number of seconds: - Change in speed = -0.000111 m/s * 25 s = -0.00278 m/s

Answer

The speed of the train will change by approximately -0.00278 m/s after 25 seconds.

Please let me know if there is anything else I can help you with!