A particle moves in the - plane

PHYSICS · Multi-part · CBSE · Physics · Motion in a Plane · Motion in a Plane

Problem

A particle moves in the

x

y

plane. Its initial velocity and acceleration are

\mathbf{u}=(4\hat{i}+8\hat{j})\,\text{m/s}

and

\mathbf{a}=(2\hat{i}-4\hat{j})\,\text{m/s}^2

, respectively. Its initial coordinates are

(4\,\text{m},10\,\text{m})

. Find: (a) The time when the particle crosses the

x

-axis. (b) The

x

-coordinate of the particle at this instant. (c) The velocity of the particle at this instant.