Question

a distance time graph of three cars A,B,C is shown below. compare the velocities with reference to the graph​

Answer 1

velocity is the rate of change of displacement per unit time.

so, slope of displacement-time graph indicates the velocity.

To find velocity , using formula, v = (final position - initial position)/(time interval)

for graph A :

velocity of car A , $v_A$= (25m - 10m)/(2s - 0s)

= 15/2 = 7.5 m/s

for graph C :

velocity of car C, $v_C$ = (20m - 0m)/(4s - 0s) = 20/4 = 5m/s

for graph B:

velocity of car B, $v_B$ = (10m - 0m)/(5s - 0s) = 10/5 = 2m/s

here it is clear that, $v_A > v_C > v_B$