Question

Car A moves towards north with the velocity of 10m/s.Car B moves towards south-east with the velocity of 5m/s.
Find velocity of A with respect to B.
plz answer asap​

Answer 1

Answer:

Explanation:

Let us assume that the right direction is positive.

We are given: v  

A

​  

=20ms  

−1

,v  

B

​  

=15ms  

−1

,

Relative velocity of B w.r.t A:v  

B  

/

​  

A

​  

=v  

B

​  

−v  

A

​  

=15−20=−5ms  

−1

 (Negative sign indicates that this relative velocity is in the left direction.)

Relative velocity of A w.r.t B:v  

A  

/

​  

B

​  

=v  

A

​  

−v  

B

​  

=20−15=5ms  

−1

 

(Positive sign indicates that this relative velocity is in the right direction.)

Here the separation between A and B is decreasing with time, hence the velocity of approach of A w.r.t B is 5ms  

−1

.