What is the average speed of a train on the stretch between two stations, if it traveled the first half of the distance between

What is the average speed of a train on the stretch between two stations, if it traveled the first half of the distance between stations at an average speed of 50 km / h, and the second at an average speed of 70 km / h?

To find the value of the average speed of the specified train on the stretch, it is necessary to use the formula: Vav = S / (tн + tк) = S / (S / 2Vн + S / 2Vк) = 1 / (1 / 2Vн + 1 / 2Vк).

Variables: Vн – initial speed of the specified train (Vн = 50 km / h); Vк – final speed (Vк = 70 km / h).

Calculation: Vav = 1 / (1 / 2Vn + 1 / 2Vk) = 1 / (1 / (2 * 50) + 1 / (2 * 70)) = 58.3 (3) m / s.

Answer: The average speed of the specified train on the stretch was 58.3 (3) m / s.




One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.

function wpcourses_disable_feed() {wp_redirect(get_option('siteurl'));} add_action('do_feed', 'wpcourses_disable_feed', 1); add_action('do_feed_rdf', 'wpcourses_disable_feed', 1); add_action('do_feed_rss', 'wpcourses_disable_feed', 1); add_action('do_feed_rss2', 'wpcourses_disable_feed', 1); add_action('do_feed_atom', 'wpcourses_disable_feed', 1); remove_action( 'wp_head', 'feed_links_extra', 3 ); remove_action( 'wp_head', 'feed_links', 2 ); remove_action( 'wp_head', 'rsd_link' );