Question

David goes from his house to school at a uniform speed of U metre per second and returns back at V metre per second if the distance between his home and school is D metres then find average speed and average velocity​

Answer 1

Step-by-step explanation:

Time= D/V+D/U

=DV+DU/VU=D(U+V)/VU

Avg Speed=Total Dist/time

=D+D/D(U+V)/UV

=2UV/U+V

AVG VEL=0 (AS DISPLACEMENT=0)