Question

Two particles A and B travels along x and y axes with
respective constant velocities V1=í m/s and
v2,= 2 m/s. At time t= 0 they are at positions
(-2, 0) m and (0, 1).m respectively. The position
vector of particle B w.rt. the particle A at t = 3
second will be with explanation ​

Answer 1

Answer:

Let us solve of any t = t

Initially A was at -2 . After time t , Partical A will travel vt = 1×t in x direction . So after t it's coordinate will be -2 + t

Similarly y coordinate of B

1 + 2t

Vector

$(2 - t) i + (2t + 1)j$

Put t= 3

-i + 7j