You are runing towards your friend at 5.0 m/s. He is running directly away from you, in a straight line, at 2.0 m/s. What is your velocity relative to him?

A. -7.0 m/s
B. +7.0 m/s
C. -3.0 m/s
D. +3.0 m/s

Respuesta :

our speed is given as

[tex]v_1 = 5 m/s[/tex] towards friend

Speed of the friend

[tex]v_2 = 2 m/s[/tex] away from us

now relative velocity with respect to our friend is given as

[tex]v_{12} = v_1 - v_2[/tex]

[tex]v_{12} = 5 - 2[/tex]

[tex]v_{12} = 3 m/s[/tex]

so here the relative velocity will be 3 m/s towards the friend

so friend will see that we are moving towards him with relative velocity of 3 m/s

Q&A Education