Question

Наташа и Андрей идут навстречу друг другу. Скорость Наташи 3м/с, а Андрея 5м/с. Чемузыка равна их скорость сближения? Как она изменится если Андрей будет идти за Наташей?

Answer 1

Calculation of the Rate of Approach

To calculate the rate of approach between Natasha and Andrey, we need to find the difference between their speeds. Since they are walking towards each other, their speeds will add up. Natasha's speed is 3 m/s and Andrey's speed is 5 m/s. Therefore, the rate of approach is the sum of their speeds, which is 8 m/s.

Change in Rate of Approach if Andrey Follows Natasha

If Andrey starts walking behind Natasha instead of towards her, the rate of approach will change. In this case, their speeds will subtract from each other. Since Natasha's speed is 3 m/s and Andrey's speed is 5 m/s, the rate of approach will be the difference between their speeds, which is -2 m/s.

The negative sign indicates that they are moving away from each other. So, if Andrey follows Natasha, the rate of approach will be -2 m/s, indicating that they are moving apart at a speed of 2 m/s.