Grades 9-10 Video Solutions 2022-2022_9-10

Video Transcription

Video Summary

In a race around a 550-meter circular track, a rabbit and a hedgehog run at constant speeds of 10 m/s and 1 m/s, respectively, with the hedgehog running in the opposite direction. They meet after 50 seconds, calculated by dividing the track length by their combined speed of 11 m/s. Once they meet, the hedgehog turns to chase the rabbit. The rabbit finishes in 55 seconds (550 meters / 10 m/s), and the hedgehog reaches the finish 45 seconds after the rabbit. Thus, the hedgehog completes the race 45 seconds later than the rabbit.

Keywords

circular track

constant speeds

rabbit and hedgehog

race dynamics

meeting point