Question

Determine the distance travelled by the vehicle between time t=120s and time t=160s

Answer 1

$a=\Delta v/\Delta t=(20-30)/(160-120)=-0.25\ (m/s^2)$

$s=(v^2-v_0^2)/(2a)=(20^2-30^2)/(2\cdot(-0.25))=1000\ (m)$ . Answer