Question

The relative velocity $V_{AB}$ or $V_{BA}$ of two bodies $A\&B$ may be
(a) greater than velocity of body $A$
(b) greater than velocity of body $B$
(c) less than the velocity of body $A$
(d) less than the velocity of body $B$

Which of the above statements are correct?

• A. (a) and (b) only
• B. (c) and (d) only
• C. (a), (b) and (c) only
• D. (a), (b), (c) and (d)

Answer 1

The correct option is D (a), (b), (c) and (d)

All options are correct:
(i) When two bodies $A\&B$ move in
opposite directions then relative velocity between $A\&B$
either $V_{AB}$ or $V_{BA}$ both are greater than $V_A\&V_B$.

(ii) When two bodies $A\&B$ move in parallel direction then
$V_{AB}=V_A-V_B\Rightarrow V_{AB}<V_A$
$V_{BA}=V_B-V_A\Rightarrow V_{BA}<V_B$