Question

Two cars A and B are moving in opposite directions with the velocity of 20m/s and 6m/s respectively Calculate the relative of car A with respect to car B If they move in the same velocity what will be the relative velocity of CarA with respect to Car B

Answer 1

Answer:

Here also let us assume the right direction is positive, then the left direction will be negative.

Given:

v

A

=

−15ms−1

,

v

B

=

20ms−1

Relative velocity of B w.r.t A:

v

B

/

A

=

v

B

−

v

A

=

20−

(−15)=

35ms

−1

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

Relative velocity of A w.r.t B:

v

A

/

B

=

v

A

−

v

B

=

−15−

20=

−35ms

−1

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

Here the separation between A and B is increasing with time, hence the velocity of separation is

35ms

−1

.