Question

Two particles start simultaneously from the same point and move along two straight lines, one with uniform velocity v and other with a uniform acceler
Two particles start simultaneously from the same point and move along two straight lines, one with uniform velocity v and other with a uniform acceleration a If a is the angle between the lines of motion of two particles then the least value of relative velocity will be at time given by
(A):(v/a) sin a
(B):(v/a) cos a
(C):(v/a) tan a
(D):(v/a) cot a

Answer 1

Answer:

Correct option is B)

V=a×t

V

BA

=a t+(−u)

V

BA

2

=a

2

t

2

+u

2

−2au+cosα

For maximum and minimum

dt

d(V

BA

2

)

=0

2a

2

t−2au cosα

t=

a

u cosα

Hence (B) option is correct