Question

A particle is projected from the origin in a uniform gravitational field when particle is at a point P (10,20) its velocity is (î-j) Assuming horizontal as x and vertically upward as y-axis. Then choose the correct statement(s) : -​

Answer 1

, r:

r = xi + yj + zk (3.1)

If during a time interval ∆t the position vector of the particle changes from r1 to r2, the

displacement ∆r for that time interval is

∆r = r1 − r2 (3.2)

= (x2 − x1)i + (y2 − y1)j + (z2 − z1)k (3.3)