Question

In which of the following graphs below are both runners moving at the same speed?

Answer 1

Explanation:

In this case, we need to identify the graph in which both the runners are moving at the same speed. All the graphs shows distance time graphs.

The attached graph shows that the both runners are moving with same speed. Both the objects have same slope.

The slope of the graph is given by :

$m=\dfrac{x_2-x_1}{t_2-t_1}$

Also, both lines are parallel to each other and two parallel lines have same slope. So, in figure (d), both runners are moving at the same speed.

Answer 2

Graph D; They have the same slope, but start at a different distance.