Question

a bus starts its journey from rest with constant acceleration 5m/s^2 find its velocity at t=2sec.and draw v-t graph.

Answer 1

$v(t) = a\cdot t+v(0)$

$acceleration =5( \tfrac{m}{s^{2}} )$

$v(0)=0$ (at rest)

$v(t)=5\cdot t+0$

$v(t)=5t$

$v(2sec)=5\cdot 2=10( \tfrac{m}{s} )$

velocity - time graph: