Question

Two particles A and B, move with constant velocities, A with velocity VA = 3i+ 4j and B with velocity VB = xi + 2j) At the initial moment their positions are (20i + 0j) are (100i +20j). If the two particles collide then value of x is​

Answer 1

Answer:

Correct option is B)

For the collision the final position of the both particles should be equal.

hence,

r

1

+

v

1

t=

r

2

+

v

2

t

or

r

1

−

r

2

=(

v

2

−

v

1

)t

or

r

1

−

r

2

=(

v

2

−

v

1

)

∣

v

2

−

v

1

∣

∣

r

1

−

r

2

∣

or

∣

r

1

−

r

2

∣

r

1

−

r

2

=

∣

v

2

−

v

1

∣

v

2

−

v

1