Question

A particle is moving eastward with velocity 2m/s . in 4s the velocity changes to 2 root 2 in southward direction. the average acc. is

Answer 1

If we take eastward direction as positive x direction,

The initial velocity of particle is u=2i + 0j.

Then the final velocity of particle is...

$-2\sqrt{2} j$

Now acceleration of the particle is defined as ...

acceleration= change in velocity/time taken

so......

(v-u)/4

=(2i-2root2j)/4

=i/2 - j/2 ms^-2