Question

Represent vectorically a velocity of 10m/s.

Answer 1

We know that,
Velocity=displacement / time

Thus ,break the velocity into its x and y component.
And thus u represent it vectorially.

Hope it helps.....

Answer 2

The thing to catch in this question is what is actually given, which is the rate of change of velocity. This makes our job very easy, as the physical quantity represented by the body is acceleration(by definition), and it's magnitude is given by,

a = dv/dt, which qualitatively implies

a = (Change in velocity)/(Change in time)

=> 10/1 = 10 m/s^2